Patchwork 3.8.2: xhci port is dead until pcieport PME# goes to disabled

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Submitter Martin Mokrejs
Date March 14, 2013, 5:30 p.m.
Message ID <5142094D.2070305@fold.natur.cuni.cz>
Download mbox | patch
Permalink /patch/227761/
State Not Applicable
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Comments

Martin Mokrejs - March 14, 2013, 5:30 p.m.
[resend, no dmesg attached]

Hi,
  happened to me again that I plugged in some devcie into my USB3 socket
in my laptop (usually use an external HUB). Don't believe this is a new
issue as a whole, I am facing this time to time since 3.3 time when I bought
the laptop. 
  But now, I realized the first device works but subsequently plugged in
devices do not show up until until I run 'lsusb -vv'. Simple 'lsusb -v'
or 'lsusb -t' is not enough. The port starts to work after dmesg logs:


[ 1445.597641] pcieport 0000:00:1c.4: PME# disabled
[ 1445.617667] xhci_hcd 0000:0b:00.0: PME# disabled

I believe lsusb -vv while querying for the detailed device info triggers
a fix.

Funny, but maybe this will help us to understand why my express card slot
somehow relates to the USB3 proivided by the TexasInstruments chip. This
is a SandyBridge-based Dell Vostro 3550 laptop. I should add that on the usb
mailing list about a year ago some TexasInstruments developer published that
they had a hardware bug in a "USB redriver", and as my laptop was made in
fall 2011 I am likely having having the buggy HW. If I remember right, the
report was about the problem that once you pluging a USB2 device into the XHCI
slot, subsequently plugged in USB3 devices won't negotiate at SuperSpeed until
you power off computer. So, I think I face a different issue but had to mention
this.

I use pcie_aspm=off on my kernel command line. I tried to catch some usb traffic
on the dead port but the file from usbmon is really empty until I do the
'lsusb -vv'. I tried to turn off the usb powersaving at runtime but I do not
have the file to do:

# echo -n -1 > /sys/bus/usb/devices/3-0\:1.0/power/autosuspend

:(

# ls -la /sys/bus/usb/devices/3-0\:1.0/power/
total 0
drwxr-xr-x 2 root root    0 Mar 14 13:11 .
drwxr-xr-x 6 root root    0 Mar 14 13:58 ..
-rw-r--r-- 1 root root 4096 Mar 14 13:11 async
-r--r--r-- 1 root root 4096 Mar 14 13:11 runtime_active_kids
-r--r--r-- 1 root root 4096 Mar 14 13:11 runtime_enabled
-r--r--r-- 1 root root 4096 Mar 14 13:11 runtime_status
-r--r--r-- 1 root root 4096 Mar 14 13:11 runtime_usage
#

I feel related could be patches under thread: "usb: add usb port auto power off mechanism"


Below is a dmesg since a cold boot. I plugged in a mouse into the USB3 socket.

[   91.463285] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_suspend: 0
[   91.463377] xhci_hcd 0000:0b:00.0: PME# enabled
[  447.389700] xhci_hcd 0000:0b:00.0: PME# disabled
[  447.389711] xhci_hcd 0000:0b:00.0: enabling bus mastering
[  447.389787] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_resume: 0
[  447.389819] usb usb3: usb wakeup-resume

Was detected. Unplugged the mouse. 

[  459.600056] usb 3-2: USB disconnect, device number 2
[  459.600058] usb 3-2: unregistering device
[  459.600059] usb 3-2: unregistering interface 3-2:1.0
[  459.600622] xhci_hcd 0000:0b:00.0: shutdown urb ffff88040a641870 ep1in-intr
[  459.702564] usb 3-2: usb_disable_device nuking all URBs
[  459.707948] usb 3-2: Successful Endpoint Configure command
[  459.860892] hub 3-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x100
[  459.860910] hub 3-0:1.0: hub_suspend
[  459.860917] usb usb3: bus auto-suspend, wakeup 1
[  459.860981] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_suspend: 0
[  459.861070] xhci_hcd 0000:0b:00.0: PME# enabled

Then I put the mouse back, I think it was not detected after until I did the lsusb
trick. I am not sure, sorry, but is not that important. I was repeating test once
again and just forgot now this detail. So below just that the mouse got detected,
either thanks to lsusb -vv or not.

[  536.745422] xhci_hcd 0000:0b:00.0: PME# disabled
[  536.745435] xhci_hcd 0000:0b:00.0: enabling bus mastering
[  536.745487] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_resume: 0
[  536.745493] usb usb3: usb auto-resume
[  536.745509] hub 3-0:1.0: hub_resume
[  536.745579] hub 3-0:1.0: port 2: status 0301 change 0001

Then a mouse disconnect:

[  652.232958] usb 3-2: USB disconnect, device number 3
[  652.232960] usb 3-2: unregistering device
[  652.232961] usb 3-2: unregistering interface 3-2:1.0
[  652.233148] xhci_hcd 0000:0b:00.0: shutdown urb ffff88040b1ee288 ep1in-intr
[  652.333325] usb 3-2: usb_disable_device nuking all URBs
[  652.337096] usb 3-2: Successful Endpoint Configure command
[  652.492164] hub 3-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x100
[  652.492183] hub 3-0:1.0: hub_suspend
[  652.492190] usb usb3: bus auto-suspend, wakeup 1
[  652.492254] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_suspend: 0
[  652.492341] xhci_hcd 0000:0b:00.0: PME# enabled
[  652.522157] pcieport 0000:00:1c.4: PME# enabled

[  688.128198] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)

Note above two things pcieport started to mess in. I you look what xhci_hcd printed
in previous attempts the was NO pcieport involved around, at all. Now, provided
that I reported the kmemleak multiple times this year:

unreferenced object 0xffff88040b4a0690 (size 256):
  comm "swapper/0", pid 1, jiffies 4294937581 (age 17428.760s)
  hex dump (first 32 bytes):
    00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
    ff ff ff ff ff ff ff ff d8 9f 57 82 ff ff ff ff  ..........W.....
  backtrace:
    [<ffffffff815fcec7>] kmemleak_alloc+0x21/0x3e
    [<ffffffff81117ac4>] slab_post_alloc_hook+0x28/0x2a
    [<ffffffff8111a18f>] __kmalloc+0xf3/0x105
    [<ffffffff8132b20c>] kzalloc.constprop.14+0xe/0x10
    [<ffffffff8132b66d>] device_private_init+0x14/0x63
    [<ffffffff8132d790>] dev_set_drvdata+0x19/0x2f
    [<ffffffff813f19d1>] i801_probe+0x5e/0x41a
    [<ffffffff812924d8>] local_pci_probe+0x39/0x61
    [<ffffffff812936fb>] pci_device_probe+0xc6/0xf3
    [<ffffffff8132dd59>] driver_probe_device+0xa9/0x1c1
    [<ffffffff8132decb>] __driver_attach+0x5a/0x7e
    [<ffffffff8132c5f3>] bus_for_each_dev+0x5c/0x88
    [<ffffffff8132d8f6>] driver_attach+0x19/0x1b
    [<ffffffff8132d4c6>] bus_add_driver+0xa8/0x1fa
    [<ffffffff8132e33d>] driver_register+0x8c/0x106
    [<ffffffff812932f6>] __pci_register_driver+0x5c/0x60

I believe this is related to the issue, somehow.

Now I started usbmon, so lets follow another attempt to repeat the bug. For clarity,
I will plug into the socket a kayboard, and it won't work until I do 'lsusb -vv'.
I pressed then space on the keyboard and that worked immediately (keyboard was dead
until lsusb -vv and also dmesg did not log anything).

So, lsusb -vv:

[  802.986036] pcieport 0000:00:1c.4: PME# disabled
[  803.016008] xhci_hcd 0000:0b:00.0: PME# disabled
[  803.016021] xhci_hcd 0000:0b:00.0: enabling bus mastering
[  803.016078] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_resume: 0
[  803.016085] usb usb3: usb auto-resume
[  803.016103] hub 3-0:1.0: hub_resume
[  803.016172] hub 3-0:1.0: port 2: status 0301 change 0001

unplug of the keyboard:

[  821.621331] usb usb4: usb auto-resume
[  821.621347] hub 4-0:1.0: hub_resume
[  821.621405] hub 4-0:1.0: state 7 ports 2 chg 0000 evt 0000
[  821.622047] hub 4-0:1.0: hub_suspend
[  821.622053] usb usb4: bus auto-suspend, wakeup 1
[  967.433533] hub 3-0:1.0: state 7 ports 2 chg 0000 evt 0004
[  967.433768] hub 3-0:1.0: port 2, status 0100, change 0001, 12 Mb/s
[  967.433771] usb 3-2: USB disconnect, device number 4
[  967.433772] usb 3-2: unregistering device
[  967.433775] usb 3-2: unregistering interface 3-2:1.0
[  967.433946] xhci_hcd 0000:0b:00.0: shutdown urb ffff88040a641948 ep1in-intr
[  967.579130] usb 3-2: usb_disable_device nuking all URBs
[  967.584494] usb 3-2: Successful Endpoint Configure command
[  967.798027] hub 3-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x100
[  967.798046] hub 3-0:1.0: hub_suspend
[  967.798075] usb usb3: bus auto-suspend, wakeup 1
[  967.798155] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_suspend: 0
[  967.798242] xhci_hcd 0000:0b:00.0: PME# enabled
[  967.828015] pcieport 0000:00:1c.4: PME# enabled


You see? pcieport is messing with
00:1c.4 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 5 (rev b5) (prog-if 00 [Normal decode])

I unplugged and replugged the keyboard multiple times and it did not work, so
I connected the mouse used in the very beginning right after cold boot, still
not working. But these were likely logged due to that.

[ 1063.263014] pcieport 0000:00:1c.4: PME# disabled
[ 1063.272918] pcieport 0000:00:1c.4: PME# enabled
[ 1063.312915] pcieport 0000:00:1c.4: PME# disabled
[ 1063.322906] pcieport 0000:00:1c.4: PME# enabled
[ 1070.132666] pcieport 0000:00:1c.4: PME# disabled
[ 1070.142559] pcieport 0000:00:1c.4: PME# enabled
[ 1070.182601] pcieport 0000:00:1c.4: PME# disabled
[ 1070.192644] pcieport 0000:00:1c.4: PME# enabled

 After doing 'lsusb -vv' I rescued the USB3 socket and it detected the mouse.

[ 1108.504953] pcieport 0000:00:1c.4: PME# disabled
[ 1108.525010] xhci_hcd 0000:0b:00.0: PME# disabled
[ 1108.525023] xhci_hcd 0000:0b:00.0: enabling bus mastering
[ 1108.525069] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_resume: 0
[ 1108.525075] usb usb3: usb auto-resume
[ 1108.525094] hub 3-0:1.0: hub_resume
[ 1108.525196] hub 3-0:1.0: port 2: status 0301 change 0001

I unplugged the mouse:

[ 1230.618019] usb 3-2: unregistering device
[ 1230.618020] usb 3-2: unregistering interface 3-2:1.0
[ 1230.618188] xhci_hcd 0000:0b:00.0: shutdown urb ffff88040b1ee288 ep1in-intr
[ 1230.711764] usb 3-2: usb_disable_device nuking all URBs
[ 1230.715101] usb 3-2: Successful Endpoint Configure command
[ 1230.870763] hub 3-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x100
[ 1230.870782] hub 3-0:1.0: hub_suspend
[ 1230.870797] usb usb3: bus auto-suspend, wakeup 1
[ 1230.870862] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_suspend: 0
[ 1230.870950] xhci_hcd 0000:0b:00.0: PME# enabled
[ 1230.900730] pcieport 0000:00:1c.4: PME# enabled


In summary, note that *immediately before the line* "xhci_hcd 0000:0b:00.0: PME# disabled"
must appear "pcieport 0000:00:1c.4: PME# disabled". Don't know who is the blocker.
But in reverse order the PME# are being enabled after a device is unplugged from the USB3
socket.

During the tests I had an eSATA in the express card slot since cold boot but don't think
it is relevant here. The express slot is 01.c7 device and the card would be 11.0.




I will send to Alan and Sarah two files directly (thank you for their inspection): ;)

The first part of testing is in usbmon_0u.bin (repeatedly connecting a mouse).

The latter in usbmon_0u_mouse_unplug_keyboard_insert.bin. Both files should demonstrate
the same issue although in the latter file it might be easier to see because the keyboard
was plugged in after a mouse and was not detected until 'lsusb -vv'.





Below is when a keyboard is connected to the dead USB3 socket:

# diff -u -w lspci_vvvxxx_mouse_unplugged.txt lspci_vvvxxx_mouse_unplugged_keyboard_inserted.txt
#



The difference in lsusb output is probably useless as it just shows that once the socket
was working the keyboard was picked up by a driver. Looks like yet another PCI issue.
At least no diffs in iomem. ;)


Thanks,
Martin

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Sarah Sharp - March 18, 2013, 5:01 p.m.
Hi Martin,

I'm really having trouble following you here.  Please don't try to tell
me what you think the root cause of the issue is.  Just tell me exactly
(in a paragraph or less) what your symptoms are.

Sending lots of log files and lsusb output at me isn't helpful if I
don't know what your issue is.

Sarah Sharp

On Thu, Mar 14, 2013 at 06:30:53PM +0100, Martin Mokrejs wrote:
> [resend, no dmesg attached]
> 
> Hi,
>   happened to me again that I plugged in some devcie into my USB3 socket
> in my laptop (usually use an external HUB). Don't believe this is a new
> issue as a whole, I am facing this time to time since 3.3 time when I bought
> the laptop. 
>   But now, I realized the first device works but subsequently plugged in
> devices do not show up until until I run 'lsusb -vv'. Simple 'lsusb -v'
> or 'lsusb -t' is not enough. The port starts to work after dmesg logs:
> 
> 
> [ 1445.597641] pcieport 0000:00:1c.4: PME# disabled
> [ 1445.617667] xhci_hcd 0000:0b:00.0: PME# disabled
> 
> I believe lsusb -vv while querying for the detailed device info triggers
> a fix.
> 
> Funny, but maybe this will help us to understand why my express card slot
> somehow relates to the USB3 proivided by the TexasInstruments chip. This
> is a SandyBridge-based Dell Vostro 3550 laptop. I should add that on the usb
> mailing list about a year ago some TexasInstruments developer published that
> they had a hardware bug in a "USB redriver", and as my laptop was made in
> fall 2011 I am likely having having the buggy HW. If I remember right, the
> report was about the problem that once you pluging a USB2 device into the XHCI
> slot, subsequently plugged in USB3 devices won't negotiate at SuperSpeed until
> you power off computer. So, I think I face a different issue but had to mention
> this.
> 
> I use pcie_aspm=off on my kernel command line. I tried to catch some usb traffic
> on the dead port but the file from usbmon is really empty until I do the
> 'lsusb -vv'. I tried to turn off the usb powersaving at runtime but I do not
> have the file to do:
> 
> # echo -n -1 > /sys/bus/usb/devices/3-0\:1.0/power/autosuspend
> 
> :(
> 
> # ls -la /sys/bus/usb/devices/3-0\:1.0/power/
> total 0
> drwxr-xr-x 2 root root    0 Mar 14 13:11 .
> drwxr-xr-x 6 root root    0 Mar 14 13:58 ..
> -rw-r--r-- 1 root root 4096 Mar 14 13:11 async
> -r--r--r-- 1 root root 4096 Mar 14 13:11 runtime_active_kids
> -r--r--r-- 1 root root 4096 Mar 14 13:11 runtime_enabled
> -r--r--r-- 1 root root 4096 Mar 14 13:11 runtime_status
> -r--r--r-- 1 root root 4096 Mar 14 13:11 runtime_usage
> #
> 
> I feel related could be patches under thread: "usb: add usb port auto power off mechanism"
> 
> 
> Below is a dmesg since a cold boot. I plugged in a mouse into the USB3 socket.
> 
> [   91.463285] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_suspend: 0
> [   91.463377] xhci_hcd 0000:0b:00.0: PME# enabled
> [  447.389700] xhci_hcd 0000:0b:00.0: PME# disabled
> [  447.389711] xhci_hcd 0000:0b:00.0: enabling bus mastering
> [  447.389787] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_resume: 0
> [  447.389819] usb usb3: usb wakeup-resume
> 
> Was detected. Unplugged the mouse. 
> 
> [  459.600056] usb 3-2: USB disconnect, device number 2
> [  459.600058] usb 3-2: unregistering device
> [  459.600059] usb 3-2: unregistering interface 3-2:1.0
> [  459.600622] xhci_hcd 0000:0b:00.0: shutdown urb ffff88040a641870 ep1in-intr
> [  459.702564] usb 3-2: usb_disable_device nuking all URBs
> [  459.707948] usb 3-2: Successful Endpoint Configure command
> [  459.860892] hub 3-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x100
> [  459.860910] hub 3-0:1.0: hub_suspend
> [  459.860917] usb usb3: bus auto-suspend, wakeup 1
> [  459.860981] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_suspend: 0
> [  459.861070] xhci_hcd 0000:0b:00.0: PME# enabled
> 
> Then I put the mouse back, I think it was not detected after until I did the lsusb
> trick. I am not sure, sorry, but is not that important. I was repeating test once
> again and just forgot now this detail. So below just that the mouse got detected,
> either thanks to lsusb -vv or not.
> 
> [  536.745422] xhci_hcd 0000:0b:00.0: PME# disabled
> [  536.745435] xhci_hcd 0000:0b:00.0: enabling bus mastering
> [  536.745487] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_resume: 0
> [  536.745493] usb usb3: usb auto-resume
> [  536.745509] hub 3-0:1.0: hub_resume
> [  536.745579] hub 3-0:1.0: port 2: status 0301 change 0001
> 
> Then a mouse disconnect:
> 
> [  652.232958] usb 3-2: USB disconnect, device number 3
> [  652.232960] usb 3-2: unregistering device
> [  652.232961] usb 3-2: unregistering interface 3-2:1.0
> [  652.233148] xhci_hcd 0000:0b:00.0: shutdown urb ffff88040b1ee288 ep1in-intr
> [  652.333325] usb 3-2: usb_disable_device nuking all URBs
> [  652.337096] usb 3-2: Successful Endpoint Configure command
> [  652.492164] hub 3-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x100
> [  652.492183] hub 3-0:1.0: hub_suspend
> [  652.492190] usb usb3: bus auto-suspend, wakeup 1
> [  652.492254] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_suspend: 0
> [  652.492341] xhci_hcd 0000:0b:00.0: PME# enabled
> [  652.522157] pcieport 0000:00:1c.4: PME# enabled
> 
> [  688.128198] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
> 
> Note above two things pcieport started to mess in. I you look what xhci_hcd printed
> in previous attempts the was NO pcieport involved around, at all. Now, provided
> that I reported the kmemleak multiple times this year:
> 
> unreferenced object 0xffff88040b4a0690 (size 256):
>   comm "swapper/0", pid 1, jiffies 4294937581 (age 17428.760s)
>   hex dump (first 32 bytes):
>     00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
>     ff ff ff ff ff ff ff ff d8 9f 57 82 ff ff ff ff  ..........W.....
>   backtrace:
>     [<ffffffff815fcec7>] kmemleak_alloc+0x21/0x3e
>     [<ffffffff81117ac4>] slab_post_alloc_hook+0x28/0x2a
>     [<ffffffff8111a18f>] __kmalloc+0xf3/0x105
>     [<ffffffff8132b20c>] kzalloc.constprop.14+0xe/0x10
>     [<ffffffff8132b66d>] device_private_init+0x14/0x63
>     [<ffffffff8132d790>] dev_set_drvdata+0x19/0x2f
>     [<ffffffff813f19d1>] i801_probe+0x5e/0x41a
>     [<ffffffff812924d8>] local_pci_probe+0x39/0x61
>     [<ffffffff812936fb>] pci_device_probe+0xc6/0xf3
>     [<ffffffff8132dd59>] driver_probe_device+0xa9/0x1c1
>     [<ffffffff8132decb>] __driver_attach+0x5a/0x7e
>     [<ffffffff8132c5f3>] bus_for_each_dev+0x5c/0x88
>     [<ffffffff8132d8f6>] driver_attach+0x19/0x1b
>     [<ffffffff8132d4c6>] bus_add_driver+0xa8/0x1fa
>     [<ffffffff8132e33d>] driver_register+0x8c/0x106
>     [<ffffffff812932f6>] __pci_register_driver+0x5c/0x60
> 
> I believe this is related to the issue, somehow.
> 
> Now I started usbmon, so lets follow another attempt to repeat the bug. For clarity,
> I will plug into the socket a kayboard, and it won't work until I do 'lsusb -vv'.
> I pressed then space on the keyboard and that worked immediately (keyboard was dead
> until lsusb -vv and also dmesg did not log anything).
> 
> So, lsusb -vv:
> 
> [  802.986036] pcieport 0000:00:1c.4: PME# disabled
> [  803.016008] xhci_hcd 0000:0b:00.0: PME# disabled
> [  803.016021] xhci_hcd 0000:0b:00.0: enabling bus mastering
> [  803.016078] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_resume: 0
> [  803.016085] usb usb3: usb auto-resume
> [  803.016103] hub 3-0:1.0: hub_resume
> [  803.016172] hub 3-0:1.0: port 2: status 0301 change 0001
> 
> unplug of the keyboard:
> 
> [  821.621331] usb usb4: usb auto-resume
> [  821.621347] hub 4-0:1.0: hub_resume
> [  821.621405] hub 4-0:1.0: state 7 ports 2 chg 0000 evt 0000
> [  821.622047] hub 4-0:1.0: hub_suspend
> [  821.622053] usb usb4: bus auto-suspend, wakeup 1
> [  967.433533] hub 3-0:1.0: state 7 ports 2 chg 0000 evt 0004
> [  967.433768] hub 3-0:1.0: port 2, status 0100, change 0001, 12 Mb/s
> [  967.433771] usb 3-2: USB disconnect, device number 4
> [  967.433772] usb 3-2: unregistering device
> [  967.433775] usb 3-2: unregistering interface 3-2:1.0
> [  967.433946] xhci_hcd 0000:0b:00.0: shutdown urb ffff88040a641948 ep1in-intr
> [  967.579130] usb 3-2: usb_disable_device nuking all URBs
> [  967.584494] usb 3-2: Successful Endpoint Configure command
> [  967.798027] hub 3-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x100
> [  967.798046] hub 3-0:1.0: hub_suspend
> [  967.798075] usb usb3: bus auto-suspend, wakeup 1
> [  967.798155] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_suspend: 0
> [  967.798242] xhci_hcd 0000:0b:00.0: PME# enabled
> [  967.828015] pcieport 0000:00:1c.4: PME# enabled
> 
> 
> You see? pcieport is messing with
> 00:1c.4 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 5 (rev b5) (prog-if 00 [Normal decode])
> 
> I unplugged and replugged the keyboard multiple times and it did not work, so
> I connected the mouse used in the very beginning right after cold boot, still
> not working. But these were likely logged due to that.
> 
> [ 1063.263014] pcieport 0000:00:1c.4: PME# disabled
> [ 1063.272918] pcieport 0000:00:1c.4: PME# enabled
> [ 1063.312915] pcieport 0000:00:1c.4: PME# disabled
> [ 1063.322906] pcieport 0000:00:1c.4: PME# enabled
> [ 1070.132666] pcieport 0000:00:1c.4: PME# disabled
> [ 1070.142559] pcieport 0000:00:1c.4: PME# enabled
> [ 1070.182601] pcieport 0000:00:1c.4: PME# disabled
> [ 1070.192644] pcieport 0000:00:1c.4: PME# enabled
> 
>  After doing 'lsusb -vv' I rescued the USB3 socket and it detected the mouse.
> 
> [ 1108.504953] pcieport 0000:00:1c.4: PME# disabled
> [ 1108.525010] xhci_hcd 0000:0b:00.0: PME# disabled
> [ 1108.525023] xhci_hcd 0000:0b:00.0: enabling bus mastering
> [ 1108.525069] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_resume: 0
> [ 1108.525075] usb usb3: usb auto-resume
> [ 1108.525094] hub 3-0:1.0: hub_resume
> [ 1108.525196] hub 3-0:1.0: port 2: status 0301 change 0001
> 
> I unplugged the mouse:
> 
> [ 1230.618019] usb 3-2: unregistering device
> [ 1230.618020] usb 3-2: unregistering interface 3-2:1.0
> [ 1230.618188] xhci_hcd 0000:0b:00.0: shutdown urb ffff88040b1ee288 ep1in-intr
> [ 1230.711764] usb 3-2: usb_disable_device nuking all URBs
> [ 1230.715101] usb 3-2: Successful Endpoint Configure command
> [ 1230.870763] hub 3-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x100
> [ 1230.870782] hub 3-0:1.0: hub_suspend
> [ 1230.870797] usb usb3: bus auto-suspend, wakeup 1
> [ 1230.870862] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_suspend: 0
> [ 1230.870950] xhci_hcd 0000:0b:00.0: PME# enabled
> [ 1230.900730] pcieport 0000:00:1c.4: PME# enabled
> 
> 
> In summary, note that *immediately before the line* "xhci_hcd 0000:0b:00.0: PME# disabled"
> must appear "pcieport 0000:00:1c.4: PME# disabled". Don't know who is the blocker.
> But in reverse order the PME# are being enabled after a device is unplugged from the USB3
> socket.
> 
> During the tests I had an eSATA in the express card slot since cold boot but don't think
> it is relevant here. The express slot is 01.c7 device and the card would be 11.0.
> 
> 
> 
> 
> I will send to Alan and Sarah two files directly (thank you for their inspection): ;)
> 
> The first part of testing is in usbmon_0u.bin (repeatedly connecting a mouse).
> 
> The latter in usbmon_0u_mouse_unplug_keyboard_insert.bin. Both files should demonstrate
> the same issue although in the latter file it might be easier to see because the keyboard
> was plugged in after a mouse and was not detected until 'lsusb -vv'.
> 
> 
> 
> 
> 
> Below is when a keyboard is connected to the dead USB3 socket:
> 
> # diff -u -w lspci_vvvxxx_mouse_unplugged.txt lspci_vvvxxx_mouse_unplugged_keyboard_inserted.txt
> --- lspci_vvvxxx_mouse_unplugged.txt    2013-03-14 12:22:34.000000000 +0100
> +++ lspci_vvvxxx_mouse_unplugged_keyboard_inserted.txt  2013-03-14 12:25:06.000000000 +0100
> @@ -747,7 +747,7 @@
>         Region 2: Memory at f7d10000 (64-bit, non-prefetchable) [size=8K]
>         Capabilities: [40] Power Management version 3
>                 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=100mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
> -               Status: D3 NoSoftRst+ PME-Enable+ DSel=0 DScale=0 PME-
> +               Status: D3 NoSoftRst+ PME-Enable+ DSel=0 DScale=0 PME+
>         Capabilities: [48] MSI: Enable- Count=1/8 Maskable- 64bit+
>                 Address: 0000000000000000  Data: 0000
>         Capabilities: [70] Express (v2) Endpoint, MSI 00
> @@ -785,7 +785,7 @@
>  10: 04 00 d0 f7 00 00 00 00 04 00 d1 f7 00 00 00 00
>  20: 00 00 00 00 00 00 00 00 00 00 00 00 28 10 b3 04
>  30: 00 00 00 00 40 00 00 00 00 00 00 00 0b 01 00 00
> -40: 01 48 83 fe 0b 01 00 00 05 70 86 00 00 00 00 00
> +40: 01 48 83 fe 0b 81 00 00 05 70 86 00 00 00 00 00
>  50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>  60: 30 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>  70: 10 c0 02 00 c3 8f 90 05 00 20 19 00 12 3c 07 00
> 
> 
> Now, when the port is rescued by lsusb -vv, the following can be seen:
> 
> # diff -u -w lspci_vv_mouse_unplugged_keyboard_inserted.txt lspci_vv_mouse_unplugged_keyboard_inserted_kb_alive.txt
> --- lspci_vv_mouse_unplugged_keyboard_inserted.txt      2013-03-14 12:25:13.000000000 +0100
> +++ lspci_vv_mouse_unplugged_keyboard_inserted_kb_alive.txt     2013-03-14 12:26:42.000000000 +0100
> @@ -276,7 +276,7 @@
>         Capabilities: [90] Subsystem: Dell Device 04b3
>         Capabilities: [a0] Power Management version 2
>                 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
> -               Status: D3 NoSoftRst- PME-Enable+ DSel=0 DScale=0 PME-
> +               Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
>         Kernel driver in use: pcieport
>  
>  00:1c.7 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 8 (rev b5) (prog-if 00 [Normal decode])
> @@ -476,14 +476,15 @@
>  
>  0b:00.0 USB controller: Texas Instruments TUSB73x0 SuperSpeed USB 3.0 xHCI Host Controller (rev 02) (prog-if 30 [XHCI])
>         Subsystem: Dell Device 04b3
> -       Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
> +       Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
>         Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
> +       Latency: 0, Cache Line Size: 64 bytes
>         Interrupt: pin A routed to IRQ 16
>         Region 0: Memory at f7d00000 (64-bit, non-prefetchable) [size=64K]
>         Region 2: Memory at f7d10000 (64-bit, non-prefetchable) [size=8K]
>         Capabilities: [40] Power Management version 3
>                 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=100mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
> -               Status: D3 NoSoftRst+ PME-Enable+ DSel=0 DScale=0 PME+
> +               Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
>         Capabilities: [48] MSI: Enable- Count=1/8 Maskable- 64bit+
>                 Address: 0000000000000000  Data: 0000
>         Capabilities: [70] Express (v2) Endpoint, MSI 00
> #
> 
> 
> 
> The difference in lsusb output is probably useless as it just shows that once the socket
> was working the keyboard was picked up by a driver. Looks like yet another PCI issue.
> At least no diffs in iomem. ;)
> 
> 
> Thanks,
> Martin
> 
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Martin Mokrejs - March 18, 2013, 5:20 p.m.
Hi Sarah,
  in this particular thread, the USB3 socket of the laptop works once
I plugin a device. When I unplug it and insert same or another device it appears
to be dead until I use 'lsusb -vvv'. After that, I see in dmesg the two lines:

[ 1445.597641] pcieport 0000:00:1c.4: PME# disabled
[ 1445.617667] xhci_hcd 0000:0b:00.0: PME# disabled

That's the whole story.
Thank you,
Martin

Sarah Sharp wrote:
> Hi Martin,
> 
> I'm really having trouble following you here.  Please don't try to tell
> me what you think the root cause of the issue is.  Just tell me exactly
> (in a paragraph or less) what your symptoms are.
> 
> Sending lots of log files and lsusb output at me isn't helpful if I
> don't know what your issue is.
> 
> Sarah Sharp
> 
> On Thu, Mar 14, 2013 at 06:30:53PM +0100, Martin Mokrejs wrote:
>> [resend, no dmesg attached]
>>
>> Hi,
>>   happened to me again that I plugged in some devcie into my USB3 socket
>> in my laptop (usually use an external HUB). Don't believe this is a new
>> issue as a whole, I am facing this time to time since 3.3 time when I bought
>> the laptop. 
>>   But now, I realized the first device works but subsequently plugged in
>> devices do not show up until until I run 'lsusb -vv'. Simple 'lsusb -v'
>> or 'lsusb -t' is not enough. The port starts to work after dmesg logs:
>>
>>
>> [ 1445.597641] pcieport 0000:00:1c.4: PME# disabled
>> [ 1445.617667] xhci_hcd 0000:0b:00.0: PME# disabled
>>
>> I believe lsusb -vv while querying for the detailed device info triggers
>> a fix.
>>
>> Funny, but maybe this will help us to understand why my express card slot
>> somehow relates to the USB3 proivided by the TexasInstruments chip. This
>> is a SandyBridge-based Dell Vostro 3550 laptop. I should add that on the usb
>> mailing list about a year ago some TexasInstruments developer published that
>> they had a hardware bug in a "USB redriver", and as my laptop was made in
>> fall 2011 I am likely having having the buggy HW. If I remember right, the
>> report was about the problem that once you pluging a USB2 device into the XHCI
>> slot, subsequently plugged in USB3 devices won't negotiate at SuperSpeed until
>> you power off computer. So, I think I face a different issue but had to mention
>> this.
>>
>> I use pcie_aspm=off on my kernel command line. I tried to catch some usb traffic
>> on the dead port but the file from usbmon is really empty until I do the
>> 'lsusb -vv'. I tried to turn off the usb powersaving at runtime but I do not
>> have the file to do:
>>
>> # echo -n -1 > /sys/bus/usb/devices/3-0\:1.0/power/autosuspend
>>
>> :(
>>
>> # ls -la /sys/bus/usb/devices/3-0\:1.0/power/
>> total 0
>> drwxr-xr-x 2 root root    0 Mar 14 13:11 .
>> drwxr-xr-x 6 root root    0 Mar 14 13:58 ..
>> -rw-r--r-- 1 root root 4096 Mar 14 13:11 async
>> -r--r--r-- 1 root root 4096 Mar 14 13:11 runtime_active_kids
>> -r--r--r-- 1 root root 4096 Mar 14 13:11 runtime_enabled
>> -r--r--r-- 1 root root 4096 Mar 14 13:11 runtime_status
>> -r--r--r-- 1 root root 4096 Mar 14 13:11 runtime_usage
>> #
>>
>> I feel related could be patches under thread: "usb: add usb port auto power off mechanism"
>>
>>
>> Below is a dmesg since a cold boot. I plugged in a mouse into the USB3 socket.
>>
>> [   91.463285] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_suspend: 0
>> [   91.463377] xhci_hcd 0000:0b:00.0: PME# enabled
>> [  447.389700] xhci_hcd 0000:0b:00.0: PME# disabled
>> [  447.389711] xhci_hcd 0000:0b:00.0: enabling bus mastering
>> [  447.389787] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_resume: 0
>> [  447.389819] usb usb3: usb wakeup-resume
>>
>> Was detected. Unplugged the mouse. 
>>
>> [  459.600056] usb 3-2: USB disconnect, device number 2
>> [  459.600058] usb 3-2: unregistering device
>> [  459.600059] usb 3-2: unregistering interface 3-2:1.0
>> [  459.600622] xhci_hcd 0000:0b:00.0: shutdown urb ffff88040a641870 ep1in-intr
>> [  459.702564] usb 3-2: usb_disable_device nuking all URBs
>> [  459.707948] usb 3-2: Successful Endpoint Configure command
>> [  459.860892] hub 3-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x100
>> [  459.860910] hub 3-0:1.0: hub_suspend
>> [  459.860917] usb usb3: bus auto-suspend, wakeup 1
>> [  459.860981] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_suspend: 0
>> [  459.861070] xhci_hcd 0000:0b:00.0: PME# enabled
>>
>> Then I put the mouse back, I think it was not detected after until I did the lsusb
>> trick. I am not sure, sorry, but is not that important. I was repeating test once
>> again and just forgot now this detail. So below just that the mouse got detected,
>> either thanks to lsusb -vv or not.
>>
>> [  536.745422] xhci_hcd 0000:0b:00.0: PME# disabled
>> [  536.745435] xhci_hcd 0000:0b:00.0: enabling bus mastering
>> [  536.745487] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_resume: 0
>> [  536.745493] usb usb3: usb auto-resume
>> [  536.745509] hub 3-0:1.0: hub_resume
>> [  536.745579] hub 3-0:1.0: port 2: status 0301 change 0001
>>
>> Then a mouse disconnect:
>>
>> [  652.232958] usb 3-2: USB disconnect, device number 3
>> [  652.232960] usb 3-2: unregistering device
>> [  652.232961] usb 3-2: unregistering interface 3-2:1.0
>> [  652.233148] xhci_hcd 0000:0b:00.0: shutdown urb ffff88040b1ee288 ep1in-intr
>> [  652.333325] usb 3-2: usb_disable_device nuking all URBs
>> [  652.337096] usb 3-2: Successful Endpoint Configure command
>> [  652.492164] hub 3-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x100
>> [  652.492183] hub 3-0:1.0: hub_suspend
>> [  652.492190] usb usb3: bus auto-suspend, wakeup 1
>> [  652.492254] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_suspend: 0
>> [  652.492341] xhci_hcd 0000:0b:00.0: PME# enabled
>> [  652.522157] pcieport 0000:00:1c.4: PME# enabled
>>
>> [  688.128198] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
>>
>> Note above two things pcieport started to mess in. I you look what xhci_hcd printed
>> in previous attempts the was NO pcieport involved around, at all. Now, provided
>> that I reported the kmemleak multiple times this year:
>>
>> unreferenced object 0xffff88040b4a0690 (size 256):
>>   comm "swapper/0", pid 1, jiffies 4294937581 (age 17428.760s)
>>   hex dump (first 32 bytes):
>>     00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
>>     ff ff ff ff ff ff ff ff d8 9f 57 82 ff ff ff ff  ..........W.....
>>   backtrace:
>>     [<ffffffff815fcec7>] kmemleak_alloc+0x21/0x3e
>>     [<ffffffff81117ac4>] slab_post_alloc_hook+0x28/0x2a
>>     [<ffffffff8111a18f>] __kmalloc+0xf3/0x105
>>     [<ffffffff8132b20c>] kzalloc.constprop.14+0xe/0x10
>>     [<ffffffff8132b66d>] device_private_init+0x14/0x63
>>     [<ffffffff8132d790>] dev_set_drvdata+0x19/0x2f
>>     [<ffffffff813f19d1>] i801_probe+0x5e/0x41a
>>     [<ffffffff812924d8>] local_pci_probe+0x39/0x61
>>     [<ffffffff812936fb>] pci_device_probe+0xc6/0xf3
>>     [<ffffffff8132dd59>] driver_probe_device+0xa9/0x1c1
>>     [<ffffffff8132decb>] __driver_attach+0x5a/0x7e
>>     [<ffffffff8132c5f3>] bus_for_each_dev+0x5c/0x88
>>     [<ffffffff8132d8f6>] driver_attach+0x19/0x1b
>>     [<ffffffff8132d4c6>] bus_add_driver+0xa8/0x1fa
>>     [<ffffffff8132e33d>] driver_register+0x8c/0x106
>>     [<ffffffff812932f6>] __pci_register_driver+0x5c/0x60
>>
>> I believe this is related to the issue, somehow.
>>
>> Now I started usbmon, so lets follow another attempt to repeat the bug. For clarity,
>> I will plug into the socket a kayboard, and it won't work until I do 'lsusb -vv'.
>> I pressed then space on the keyboard and that worked immediately (keyboard was dead
>> until lsusb -vv and also dmesg did not log anything).
>>
>> So, lsusb -vv:
>>
>> [  802.986036] pcieport 0000:00:1c.4: PME# disabled
>> [  803.016008] xhci_hcd 0000:0b:00.0: PME# disabled
>> [  803.016021] xhci_hcd 0000:0b:00.0: enabling bus mastering
>> [  803.016078] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_resume: 0
>> [  803.016085] usb usb3: usb auto-resume
>> [  803.016103] hub 3-0:1.0: hub_resume
>> [  803.016172] hub 3-0:1.0: port 2: status 0301 change 0001
>>
>> unplug of the keyboard:
>>
>> [  821.621331] usb usb4: usb auto-resume
>> [  821.621347] hub 4-0:1.0: hub_resume
>> [  821.621405] hub 4-0:1.0: state 7 ports 2 chg 0000 evt 0000
>> [  821.622047] hub 4-0:1.0: hub_suspend
>> [  821.622053] usb usb4: bus auto-suspend, wakeup 1
>> [  967.433533] hub 3-0:1.0: state 7 ports 2 chg 0000 evt 0004
>> [  967.433768] hub 3-0:1.0: port 2, status 0100, change 0001, 12 Mb/s
>> [  967.433771] usb 3-2: USB disconnect, device number 4
>> [  967.433772] usb 3-2: unregistering device
>> [  967.433775] usb 3-2: unregistering interface 3-2:1.0
>> [  967.433946] xhci_hcd 0000:0b:00.0: shutdown urb ffff88040a641948 ep1in-intr
>> [  967.579130] usb 3-2: usb_disable_device nuking all URBs
>> [  967.584494] usb 3-2: Successful Endpoint Configure command
>> [  967.798027] hub 3-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x100
>> [  967.798046] hub 3-0:1.0: hub_suspend
>> [  967.798075] usb usb3: bus auto-suspend, wakeup 1
>> [  967.798155] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_suspend: 0
>> [  967.798242] xhci_hcd 0000:0b:00.0: PME# enabled
>> [  967.828015] pcieport 0000:00:1c.4: PME# enabled
>>
>>
>> You see? pcieport is messing with
>> 00:1c.4 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 5 (rev b5) (prog-if 00 [Normal decode])
>>
>> I unplugged and replugged the keyboard multiple times and it did not work, so
>> I connected the mouse used in the very beginning right after cold boot, still
>> not working. But these were likely logged due to that.
>>
>> [ 1063.263014] pcieport 0000:00:1c.4: PME# disabled
>> [ 1063.272918] pcieport 0000:00:1c.4: PME# enabled
>> [ 1063.312915] pcieport 0000:00:1c.4: PME# disabled
>> [ 1063.322906] pcieport 0000:00:1c.4: PME# enabled
>> [ 1070.132666] pcieport 0000:00:1c.4: PME# disabled
>> [ 1070.142559] pcieport 0000:00:1c.4: PME# enabled
>> [ 1070.182601] pcieport 0000:00:1c.4: PME# disabled
>> [ 1070.192644] pcieport 0000:00:1c.4: PME# enabled
>>
>>  After doing 'lsusb -vv' I rescued the USB3 socket and it detected the mouse.
>>
>> [ 1108.504953] pcieport 0000:00:1c.4: PME# disabled
>> [ 1108.525010] xhci_hcd 0000:0b:00.0: PME# disabled
>> [ 1108.525023] xhci_hcd 0000:0b:00.0: enabling bus mastering
>> [ 1108.525069] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_resume: 0
>> [ 1108.525075] usb usb3: usb auto-resume
>> [ 1108.525094] hub 3-0:1.0: hub_resume
>> [ 1108.525196] hub 3-0:1.0: port 2: status 0301 change 0001
>>
>> I unplugged the mouse:
>>
>> [ 1230.618019] usb 3-2: unregistering device
>> [ 1230.618020] usb 3-2: unregistering interface 3-2:1.0
>> [ 1230.618188] xhci_hcd 0000:0b:00.0: shutdown urb ffff88040b1ee288 ep1in-intr
>> [ 1230.711764] usb 3-2: usb_disable_device nuking all URBs
>> [ 1230.715101] usb 3-2: Successful Endpoint Configure command
>> [ 1230.870763] hub 3-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x100
>> [ 1230.870782] hub 3-0:1.0: hub_suspend
>> [ 1230.870797] usb usb3: bus auto-suspend, wakeup 1
>> [ 1230.870862] xhci_hcd 0000:0b:00.0: hcd_pci_runtime_suspend: 0
>> [ 1230.870950] xhci_hcd 0000:0b:00.0: PME# enabled
>> [ 1230.900730] pcieport 0000:00:1c.4: PME# enabled
>>
>>
>> In summary, note that *immediately before the line* "xhci_hcd 0000:0b:00.0: PME# disabled"
>> must appear "pcieport 0000:00:1c.4: PME# disabled". Don't know who is the blocker.
>> But in reverse order the PME# are being enabled after a device is unplugged from the USB3
>> socket.
>>
>> During the tests I had an eSATA in the express card slot since cold boot but don't think
>> it is relevant here. The express slot is 01.c7 device and the card would be 11.0.
>>
>>
>>
>>
>> I will send to Alan and Sarah two files directly (thank you for their inspection): ;)
>>
>> The first part of testing is in usbmon_0u.bin (repeatedly connecting a mouse).
>>
>> The latter in usbmon_0u_mouse_unplug_keyboard_insert.bin. Both files should demonstrate
>> the same issue although in the latter file it might be easier to see because the keyboard
>> was plugged in after a mouse and was not detected until 'lsusb -vv'.
>>
>>
>>
>>
>>
>> Below is when a keyboard is connected to the dead USB3 socket:
>>
>> # diff -u -w lspci_vvvxxx_mouse_unplugged.txt lspci_vvvxxx_mouse_unplugged_keyboard_inserted.txt
>> --- lspci_vvvxxx_mouse_unplugged.txt    2013-03-14 12:22:34.000000000 +0100
>> +++ lspci_vvvxxx_mouse_unplugged_keyboard_inserted.txt  2013-03-14 12:25:06.000000000 +0100
>> @@ -747,7 +747,7 @@
>>         Region 2: Memory at f7d10000 (64-bit, non-prefetchable) [size=8K]
>>         Capabilities: [40] Power Management version 3
>>                 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=100mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
>> -               Status: D3 NoSoftRst+ PME-Enable+ DSel=0 DScale=0 PME-
>> +               Status: D3 NoSoftRst+ PME-Enable+ DSel=0 DScale=0 PME+
>>         Capabilities: [48] MSI: Enable- Count=1/8 Maskable- 64bit+
>>                 Address: 0000000000000000  Data: 0000
>>         Capabilities: [70] Express (v2) Endpoint, MSI 00
>> @@ -785,7 +785,7 @@
>>  10: 04 00 d0 f7 00 00 00 00 04 00 d1 f7 00 00 00 00
>>  20: 00 00 00 00 00 00 00 00 00 00 00 00 28 10 b3 04
>>  30: 00 00 00 00 40 00 00 00 00 00 00 00 0b 01 00 00
>> -40: 01 48 83 fe 0b 01 00 00 05 70 86 00 00 00 00 00
>> +40: 01 48 83 fe 0b 81 00 00 05 70 86 00 00 00 00 00
>>  50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  60: 30 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>  70: 10 c0 02 00 c3 8f 90 05 00 20 19 00 12 3c 07 00
>>
>>
>> Now, when the port is rescued by lsusb -vv, the following can be seen:
>>
>> # diff -u -w lspci_vv_mouse_unplugged_keyboard_inserted.txt lspci_vv_mouse_unplugged_keyboard_inserted_kb_alive.txt
>> --- lspci_vv_mouse_unplugged_keyboard_inserted.txt      2013-03-14 12:25:13.000000000 +0100
>> +++ lspci_vv_mouse_unplugged_keyboard_inserted_kb_alive.txt     2013-03-14 12:26:42.000000000 +0100
>> @@ -276,7 +276,7 @@
>>         Capabilities: [90] Subsystem: Dell Device 04b3
>>         Capabilities: [a0] Power Management version 2
>>                 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
>> -               Status: D3 NoSoftRst- PME-Enable+ DSel=0 DScale=0 PME-
>> +               Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
>>         Kernel driver in use: pcieport
>>  
>>  00:1c.7 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 8 (rev b5) (prog-if 00 [Normal decode])
>> @@ -476,14 +476,15 @@
>>  
>>  0b:00.0 USB controller: Texas Instruments TUSB73x0 SuperSpeed USB 3.0 xHCI Host Controller (rev 02) (prog-if 30 [XHCI])
>>         Subsystem: Dell Device 04b3
>> -       Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
>> +       Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
>>         Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
>> +       Latency: 0, Cache Line Size: 64 bytes
>>         Interrupt: pin A routed to IRQ 16
>>         Region 0: Memory at f7d00000 (64-bit, non-prefetchable) [size=64K]
>>         Region 2: Memory at f7d10000 (64-bit, non-prefetchable) [size=8K]
>>         Capabilities: [40] Power Management version 3
>>                 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=100mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
>> -               Status: D3 NoSoftRst+ PME-Enable+ DSel=0 DScale=0 PME+
>> +               Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
>>         Capabilities: [48] MSI: Enable- Count=1/8 Maskable- 64bit+
>>                 Address: 0000000000000000  Data: 0000
>>         Capabilities: [70] Express (v2) Endpoint, MSI 00
>> #
>>
>>
>>
>> The difference in lsusb output is probably useless as it just shows that once the socket
>> was working the keyboard was picked up by a driver. Looks like yet another PCI issue.
>> At least no diffs in iomem. ;)
>>
>>
>> Thanks,
>> Martin
>>
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> 
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Sarah Sharp - March 18, 2013, 6:26 p.m.
On Mon, Mar 18, 2013 at 06:20:12PM +0100, Martin Mokrejs wrote:
> Hi Sarah,
>   in this particular thread, the USB3 socket of the laptop works once
> I plugin a device. When I unplug it and insert same or another device it appears
> to be dead until I use 'lsusb -vvv'. After that, I see in dmesg the two lines:

Which kernel are you running on?  We had a regression that involved dead
ports after a USB disconnect in 3.8.  This was was fixed in 3.8.3.  Can
you please retest with that kernel version?

Sarah Sharp
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Martin Mokrejs - March 18, 2013, 6:52 p.m.
Sarah Sharp wrote:
> On Mon, Mar 18, 2013 at 06:20:12PM +0100, Martin Mokrejs wrote:
>> Hi Sarah,
>>   in this particular thread, the USB3 socket of the laptop works once
>> I plugin a device. When I unplug it and insert same or another device it appears
>> to be dead until I use 'lsusb -vvv'. After that, I see in dmesg the two lines:
> 
> Which kernel are you running on?  We had a regression that involved dead

As the subject says, 3.8.2. I really started last week several different email
threads, each independent.

> ports after a USB disconnect in 3.8.  This was was fixed in 3.8.3.  Can
> you please retest with that kernel version?

Hmm, will do. What change do you mean exactly?

BTW, how about this bugfix which just appeared at linux-pci?
[PATCH] PCI: Remove not needed check in disable aspm link


Thank you,
Martin
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Sarah Sharp - March 18, 2013, 7:58 p.m.
On Mon, Mar 18, 2013 at 07:52:10PM +0100, Martin Mokrejs wrote:
> Sarah Sharp wrote:
> > On Mon, Mar 18, 2013 at 06:20:12PM +0100, Martin Mokrejs wrote:
> >> Hi Sarah,
> >>   in this particular thread, the USB3 socket of the laptop works once
> >> I plugin a device. When I unplug it and insert same or another device it appears
> >> to be dead until I use 'lsusb -vvv'. After that, I see in dmesg the two lines:
> > 
> > Which kernel are you running on?  We had a regression that involved dead
> 
> As the subject says, 3.8.2. I really started last week several different email
> threads, each independent.
> 
> > ports after a USB disconnect in 3.8.  This was was fixed in 3.8.3.  Can
> > you please retest with that kernel version?
> 
> Hmm, will do. What change do you mean exactly?

Commit d79303047f25957a3e00d25cc1eddb82b3ee0f89 "USB: Fix connected
device switch to Inactive state." along with three others.

> BTW, how about this bugfix which just appeared at linux-pci?
> [PATCH] PCI: Remove not needed check in disable aspm link

I understand that you want to try and figure out on your own what bug
you're hitting.  I'm really happy you're enthusiastic about reporting
and testing bug fixes.  However, looking at random bug fix patches when
we don't know the root cause is not very productive.  I would suggest
you read http://www.chiark.greenend.org.uk/~sgtatham/bugs.html,
especially the "I think the tachyon modulation must be wrongly
polarised" section.

We have no hard proof that this is even a PCI bug.  lsusb does cause the
PCI host to wakeup out of D3, which triggers the PME disable messages
you mentioned.  However, lsusb also triggers the USB core to look at the
roothub status registers.  Without further debugging, we can't be sure
if we lost a PCI wakeup from the port status change, or if the xHCI
driver mishandled the USB device disconnect and running lsusb causes the
USB core to notice the connect change.  Let's rule out the most common
case, the xHCI driver, first.

Please, try 3.8.3 first, and if that doesn't help, turn on
CONFIG_USB_DEBUG and CONFIG_USB_XHCI_HCD_DEBUGGING, and send me the
dmesg from the time you first unplug the USB 3.0 device to when you
replug it in and have to run `sudo lsusb -v` to get the device to
appear.

Sarah Sharp
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Patch

--- lspci_vvvxxx_mouse_unplugged.txt    2013-03-14 12:22:34.000000000 +0100
+++ lspci_vvvxxx_mouse_unplugged_keyboard_inserted.txt  2013-03-14 12:25:06.000000000 +0100
@@ -747,7 +747,7 @@ 
        Region 2: Memory at f7d10000 (64-bit, non-prefetchable) [size=8K]
        Capabilities: [40] Power Management version 3
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=100mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
-               Status: D3 NoSoftRst+ PME-Enable+ DSel=0 DScale=0 PME-
+               Status: D3 NoSoftRst+ PME-Enable+ DSel=0 DScale=0 PME+
        Capabilities: [48] MSI: Enable- Count=1/8 Maskable- 64bit+
                Address: 0000000000000000  Data: 0000
        Capabilities: [70] Express (v2) Endpoint, MSI 00
@@ -785,7 +785,7 @@ 
 10: 04 00 d0 f7 00 00 00 00 04 00 d1 f7 00 00 00 00
 20: 00 00 00 00 00 00 00 00 00 00 00 00 28 10 b3 04
 30: 00 00 00 00 40 00 00 00 00 00 00 00 0b 01 00 00
-40: 01 48 83 fe 0b 01 00 00 05 70 86 00 00 00 00 00
+40: 01 48 83 fe 0b 81 00 00 05 70 86 00 00 00 00 00
 50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 60: 30 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 70: 10 c0 02 00 c3 8f 90 05 00 20 19 00 12 3c 07 00


Now, when the port is rescued by lsusb -vv, the following can be seen:

# diff -u -w lspci_vv_mouse_unplugged_keyboard_inserted.txt lspci_vv_mouse_unplugged_keyboard_inserted_kb_alive.txt
--- lspci_vv_mouse_unplugged_keyboard_inserted.txt      2013-03-14 12:25:13.000000000 +0100
+++ lspci_vv_mouse_unplugged_keyboard_inserted_kb_alive.txt     2013-03-14 12:26:42.000000000 +0100
@@ -276,7 +276,7 @@ 
        Capabilities: [90] Subsystem: Dell Device 04b3
        Capabilities: [a0] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
-               Status: D3 NoSoftRst- PME-Enable+ DSel=0 DScale=0 PME-
+               Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
        Kernel driver in use: pcieport
 
 00:1c.7 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 8 (rev b5) (prog-if 00 [Normal decode])
@@ -476,14 +476,15 @@ 
 
 0b:00.0 USB controller: Texas Instruments TUSB73x0 SuperSpeed USB 3.0 xHCI Host Controller (rev 02) (prog-if 30 [XHCI])
        Subsystem: Dell Device 04b3
-       Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
+       Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
+       Latency: 0, Cache Line Size: 64 bytes
        Interrupt: pin A routed to IRQ 16
        Region 0: Memory at f7d00000 (64-bit, non-prefetchable) [size=64K]
        Region 2: Memory at f7d10000 (64-bit, non-prefetchable) [size=8K]
        Capabilities: [40] Power Management version 3
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=100mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
-               Status: D3 NoSoftRst+ PME-Enable+ DSel=0 DScale=0 PME+
+               Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [48] MSI: Enable- Count=1/8 Maskable- 64bit+
                Address: 0000000000000000  Data: 0000
        Capabilities: [70] Express (v2) Endpoint, MSI 00