Lenovo X220 becoming unresponsive when popping out of docking station

[Hans-Gerd van Schelve]

## Issue

- Popping the laptop out of the docking station results in the machine

  becoming unresponsive and the screen corruption.

- "[drm:pch_irq_handler] *ERROR* PCH poison interrupt" entries in

  /var/log/syslog when T520 or x220 is removed from docking station

## Environment

- Natty 11.04 i386

- Lenovo x220 or T520 (Sandy Bridge)

- Laptop booted while in docking station with external monitor attached

- Machine removed from docking station

## Resolution

- There appears to be a fix for this upstream:

  http://tinyurl.com/67u2x2f

## Diagnostic Steps

- Boot X220 or T520 under 2.6.38-8 while in a docking station with monitor

  attached

- Once logged into the GUI, pop the machine out of the docking station

- The screen blinks as if it's detecting new monitor configuration, but then

  either goes blank or becomes correupted (tiled background is the usual

  effect)

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-8-generic 2.6.38-8.42
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: m525020 1542 F.... pulseaudio
CRDA: Error: [Errno 2] Datei oder Verzeichnis nicht gefunden
Card0.Amixer.info:
 Card hw:0 'PCH'/'HDA Intel PCH at 0xf2620000 irq 45'
   Mixer name : 'Intel CougarPoint HDMI'
   Components : 'HDA:14f1506e,17aa21cf,00100000 HDA:14f12c06,17aa2122,00100000 HDA:80862805,80860101,00100000'
   Controls : 20
   Simple ctrls : 8
Card29.Amixer.info:
 Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw unknown'
   Mixer name : 'ThinkPad EC (unknown)'
   Components : ''
   Controls : 1
   Simple ctrls : 1
Card29.Amixer.values:
 Simple mixer control 'Console',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Date: Fri Jun 10 09:32:32 2011
HibernationDevice: RESUME=UUID=84ff99c3-b857-402a-93f6-838d55895478
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
MachineType: LENOVO 42433RG
ProcEnviron:
 LANGUAGE=de_DE:en
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=a923e702-9784-4530-81b4-258c1ff0c56e ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-8-generic N/A
 linux-backports-modules-2.6.38-8-generic N/A
 linux-firmware 1.52
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/13/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 8AET45WW (1.25 )
dmi.board.asset.tag: Not Available
dmi.board.name: 42433RG
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr8AET45WW(1.25):bd05/13/2011:svnLENOVO:pn42433RG:pvrThinkPadT520:rvnLENOVO:rn42433RG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 42433RG
dmi.product.version: ThinkPad T520
dmi.sys.vendor: LENOVO

[dansheen (dansheen)]

I notice that changing to other X Terminal Ctrl-Alt-F8 and then back to Ctrl-Alt-F7 (can sometimes) bring X back. Sometimes not, then I restart service gdm. Sometimes machines completely crashes.

[Robert Hooker (sarvatt)]

The fix for this should be in 2.6.38.8 which hasn't yet made it into natty-proposed or natty-updates, can you give this kernel a shot?

http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.38.8-natty/

[Hans-Gerd van Schelve (van-schelve)]

I tested the kernel from #3 but the problem i still the same:
[drm:pch_irq_handler] *ERROR* PCH poison interrupt

[tobyS (tobias-schlitt)]

Are there any news on this issue? I still can not dock/undock my X220 while running, which is really annoying … :/

[Robert Hooker (sarvatt)]

IThanks for checking that and I'm sorry about the delayed response. One more kernel to try if possible, would you mind seeing if this kernel fixes it? It just contains a backport of the commit that disables FBC by default and provides a module option to reenable it in an opt-in fashion which I highly believe is the correct thing to do for natty. If it works I will send the patch to the kernel team list for inclusion in natty-proposed.

http://kernel.ubuntu.com/~sarvatt/lp795407/

[penalvch (penalvch)]

Hans-Gerd van Schelve, does https://bugs.launchpad.net/ubuntu/+source/linux/+bug/795407/comments/6 fix the issue?

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]