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[yope <732304@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Binary package hint: xserver-xorg-video-intel

Just upgraded my PC to natty as of today (alpha-3) and moved the HDD to a new PC barebone based on Intel Sandy-bridge (Core-i7 2600K) with two monitors connected.
After configureing xorg.conf and booting, kdm came up fine, but the session-type menu top-half is unreadable (garbled).
After logging in (Desktop effects disabled), everything seems to work for a few seconds with only minor display glitches, but after a random time, or at certain actions (like entering a URL in chrome), the X server freezes. Sometimes it freezes forever, and sometimes it comes back after a few seconds (display goes black for a while).
The system keeps running fine, and dmesg shows this:

...
[   44.619127] EXT4-fs (sda2): re-mounted. Opts: errors=remount-ro,commit=0
[  111.166652] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
[  111.166659] [drm:kick_ring] *ERROR* Kicking stuck semaphore on render ring
[  117.179392] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
[  117.179399] [drm:kick_ring] *ERROR* Kicking stuck semaphore on render ring
[  143.863963] exe (2839): /proc/2839/oom_adj is deprecated, please use /proc/2839/oom_score_adj instead.
[  713.763627] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
[  713.768747] [drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns -11 (awaiting 189057 at 189056, next 189058)
[  713.769135] [drm:init_ring_common] *ERROR* render ring initialization failed ctl 0001f003 head 00000000 tail 00000000 start 00000000
[  720.080216] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
[  720.080228] [drm:kick_ring] *ERROR* Kicking stuck semaphore on blt ring
[  721.583394] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
[  721.583407] [drm:kick_ring] *ERROR* Kicking stuck semaphore on blt ring
[  723.086571] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
[  723.086582] [drm:kick_ring] *ERROR* Kicking stuck semaphore on blt ring
[  724.589766] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
[  724.589799] [drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns -11 (awaiting 189083 at 188507, next 189084)

In the situation shown above the X server had recovered from the freeze.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xserver-xorg-video-intel 2:2.14.0-4ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-6.34-generic-pae 2.6.38-rc7
Uname: Linux 2.6.38-6-generic-pae i686
Architecture: i386
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: kwin
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.HDMI.A.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1280x1024 1280x1024 1152x864 1024x768 1024x768 1024x768 832x624 800x600 800x600 800x600 640x480 640x480 640x480 720x400
 edid-base64: AP///////wAi8OomAQEBAS8RAQOAIhuM7txVo1lIniQRUFSt74CBgAEBAQEBAQEBAQEBAQEBMCoAmFEAKkAwcBMAVA4RAAAeAAAA/QAyTRhTDgAKICAgICAgAAAA/ABIUCBMMTc1MAogICAgAAAA/wBDTkQ3NDcyTUtKCiAgAHM=
DRM.card0.HDMI.A.2:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes: 
 edid-base64:
DRM.card0.VGA.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1280x1024 1280x1024 1152x864 1024x768 1024x768 1024x768 832x624 800x600 800x600 800x600 640x480 640x480 640x480 720x400
 edid-base64: AP///////wAi8OkmAQEBASoRAQNoIhuM7q/Ap1NFnSQXUFSt74CBgAEBAQEBAQEBAQEBAQEBMCoAmFEAKkAwcBMAVA4RAAAeAAAA/QAyTRhTDgAKICAgICAgAAAA/ABIUCBMMTc1MAogICAgAAAA/wBDTkM3NDJRR1BKCiAgADs=
Date: Wed Mar  9 23:32:14 2011
DistUpgraded: Log time: 2011-03-09 22:13:09.851169
DistroCodename: natty
DistroVariant: kubuntu
DkmsStatus:
 nvidia-current, 270.29, 2.6.38-6-generic-pae, i686: installed 
 nvidia-current, 270.29, 2.6.35-27-generic, i686: installed 
 nvidia-current, 270.29, 2.6.38-6-generic, i686: installed 
 vboxhost, 4.0.4, 2.6.38-6-generic-pae, i686: installed
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0122] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:844d]
MachineType: ASUSTeK Computer INC. V-P8H67E
ProcEnviron:
 LANGUAGE=
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-6-generic-pae root=UUID=217ebb2e-1497-4da5-9aba-7e59c4f101b3 ro crashkernel=384M-2G:64M,2G-:128M quiet splash vt.handoff=7
Renderer: Unknown
SourcePackage: xserver-xorg-video-intel
UnitySupportTest: Error: command ['/usr/lib/nux/unity_support_test', '-p'] failed with exit code -11: Xlib:  extension "GLX" missing on display ":0".
UpgradeStatus: Upgraded to natty on 2011-03-09 (0 days ago)
dmi.bios.date: 11/02/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0212
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: V-P8H67E
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0212:bd11/02/2010:svnASUSTeKComputerINC.:pnV-P8H67E:pvrSystemVersion:rvnASUSTeKComputerINC.:rnV-P8H67E:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: V-P8H67E
dmi.product.version: System Version
dmi.sys.vendor: ASUSTeK Computer INC.
version.compiz: compiz 1:0.9.4-0ubuntu4
version.libdrm2: libdrm2 2.4.23-1ubuntu3
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu1
version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu11
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu5

** Affects: xserver-xorg-video-intel (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 kubuntu natty

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https://bugs.launchpad.net/bugs/732304

Title:
  Intel sandy-bridge dual-head GPU hang