Lenovo ThinkPad T420 random hardlocks with Sandy Bridge graphics
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
Medium
|
Unassigned |
Bug Description
I would experience 1-2 hardlocks per day when running 11.04 on my T420. System was completely unresponsive and required a hard reset. I kept an eye on syslog and Xorg.0.log, but not once did I ever get any messages during the time of the lockup. I was not able to find a correlation between any particular type of usage, nor could I reproduce the problem other than just using the system for a full day.
With little information to go on other than reports of incomplete support for Intel Sandy Bridge graphics in 11.04, I started experimenting with newer packages. After more than a week of testing, the stability of my system has greatly improved after installing the xorg-edgers PPA and the following kernel:
http://
I apologize for the incompleteness of this report, but I just wanted to make a record of what works and what doesn't work for the T420 on Ubuntu 11.04.
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xorg 1:7.6+4ubuntu3
Uname: Linux 2.6.39-994-generic x86_64
Architecture: amd64
CompizPlugins: [core,bailer,
CompositorRunning: compiz
DRM.card0.DP.1:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
DRM.card0.DP.2:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
DRM.card0.DP.3:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
DRM.card0.HDMI.A.1:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
DRM.card0.HDMI.A.2:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
DRM.card0.HDMI.A.3:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
DRM.card0.LVDS.1:
status: connected
enabled: enabled
dpms: On
modes: 1600x900 1600x900
edid-base64: AP/////
DRM.card0.VGA.1:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
Date: Sat Jun 4 12:53:51 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
vboxhost, 4.0.8, 2.6.38-8-generic, x86_64: installed
vboxhost, 4.0.8, 2.6.39-994-generic, x86_64: installed
EcryptfsInUse: Yes
GraphicsCard:
Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
Subsystem: Lenovo Device [17aa:21ce]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110426)
MachineType: LENOVO 4177CTO
ProcEnviron:
LANGUAGE=en_US:en
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=
Renderer: Unknown
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/13/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 83ET56WW (1.26 )
dmi.board.
dmi.board.name: 4177CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.
dmi.modalias: dmi:bvnLENOVO:
dmi.product.name: 4177CTO
dmi.product.
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.4+
version.ia32-libs: ia32-libs 20090808ubuntu13
version.libdrm2: libdrm2 2.4.25+
version.
version.
version.
version.
version.
version.
version.
affects: | ubuntu → linux (Ubuntu) |
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
Changed in linux (Ubuntu): | |
importance: | Undecided → Medium |
Changed in linux (Ubuntu): | |
status: | Confirmed → Fix Released |
This affects me, too. Identical symptoms to what NTolerance reports.
NTolerance is running the next-proposed kernel, it seems. I tried that, too. No changes. Switched to 39.0 - same problems. Also with and without xorg-intel drivers from xorg/edgers made no difference. Random crashes, when connecting/removing external screen. Also experiencing random crashes when resuming from suspend to ram. 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.