Public bug reported: 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://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-next- proposed/current/ 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,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,unitymtgrabhandles,scale,session,unityshell] 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///////wAGrz4hAAAAACEUAQSQHxF4AmGVnFlSjyYhUFQAAAABAQEBAQEBAQEBAQEBAQEB+CpAmmGEDDBAKjMANa4QAAAYpRxAmmGEDDBAKjMANa4QAAAYAAAA/gBBVU8KICAgICAgICAgAAAA/gBCMTQwUlcwMiBWMSAKANA= 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=/vmlinuz-2.6.39-994-generic root=/dev/mapper/vg0-root ro noplymouth 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.asset.tag: Not Available dmi.board.name: 4177CTO 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:bvr83ET56WW(1.26):bd05/13/2011:svnLENOVO:pn4177CTO:pvrThinkPadT420:rvnLENOVO:rn4177CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 4177CTO dmi.product.version: ThinkPad T420 dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.4+bzr20110415-0ubuntu2 version.ia32-libs: ia32-libs 20090808ubuntu13 version.libdrm2: libdrm2 2.4.25+git20110515.61be9401-0ubuntu0sarvatt version.libgl1-mesa-dri: libgl1-mesa-dri 7.11.0+git20110603.6491e959-0ubuntu0sarvatt~natty version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 7.11.0+git20110603.6491e959-0ubuntu0sarvatt~natty version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99+git20110601.cbcc57b0-0ubuntu0sarvatt~natty version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.0+git20110531.340cfb7f-0ubuntu0sarvatt2~natty version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110323.8378443b-0ubuntu0sarvatt ** Affects: ubuntu Importance: Undecided Status: New ** Tags: amd64 apport-bug compiz-0.9 freeze natty patch running-unity ubuntu -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/792849 Title: Lenovo ThinkPad T420 random hardlocks with Sandy Bridge graphics -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
