Xorg Randomly freezes.
It usually happens when a video in Firefox is playing. In particular, Flash, and also the HTML5 Youtube player.
This happens 3-4 times a day.
It has started happening since upgrading to precise, but has not done it all the time I have been upgraded; started about 10 days ago.
Results in either:
1. Total freezing of screen
2. Screen blanks
I am not able to switch into a tty to fix it; the screen remains frozen/blank.
Affects both Unity 3D, and Unity 2D
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+12ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-21.34-generic 3.2.13
Uname: Linux 3.2.0-21-generic x86_64
NonfreeKernelModules: fglrx
.tmp.unity.support.test.0:
ApportVersion: 2.0-0ubuntu4
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: None
Date: Tue Apr 3 23:01:31 2012
DistUpgraded: 2012-03-09 20:12:00,419 DEBUG enabling apt cron job
DistroCodename: precise
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GpuHangFrequency: Several times a day
GpuHangReproducibility: Occurs more often under certain circumstances
GpuHangStarted: Within the last week or two
InstallationMedia: Ubuntu 10.04.4 LTS "Lucid Lynx" - Release amd64 (20120214.2)
MachineType: Hewlett-Packard HP G56 Notebook PC
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-21-generic root=UUID=39afe01c-f2b3-4641-bcb4-8ce61b16b5be ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: Upgraded to precise on 2012-03-09 (25 days ago)
dmi.bios.date: 11/08/2010
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.06
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 1604
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 88.06
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.06:bd11/08/2010:svnHewlett-Packard:pnHPG56NotebookPC:pvr0596100000242710010020100:rvnHewlett-Packard:rn1604:rvr88.06:cvnHewlett-Packard:ct10:cvrN/A:
dmi.product.name: HP G56 Notebook PC
dmi.product.version: 0596100000242710010020100
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.7.4-0ubuntu1
version.fglrx-installer: fglrx-installer N/A
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu8
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2
This isn't just happening in Firefox, it happens with different applications open; it is not clear what is causing it. I could describe it as "random", rather than having any particular pattern. I cannot find a way to reproduce it.