I have similar problems too. The computer is Dell Optiplex GX 260. I have disabled compiz, power saving options and updated BIOS to latest version A09.
Intel graphics is : 00:02.0 VGA compatible controller: Intel Corporation 82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device (rev 01) Subsystem: Dell Device 0126 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Interrupt: pin A routed to IRQ 16 Region 0: Memory at e8000000 (32-bit, prefetchable) [size=128M] Region 1: Memory at ff680000 (32-bit, non-prefetchable) [size=512K] Capabilities: [d0] Power Management version 1 Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME- Kernel driver in use: i915 Kernel modules: i915 Kernel panic section is : [248401.076087] i915/0 D c08145c0 0 253 2 0x00000000 [248401.076097] f6a2df04 00000046 eaa56000 c08145c0 f6ac4df8 c08145c0 3a030219 0000e1c7 [248401.076110] c08145c0 c08145c0 f6ac4df8 c08145c0 00000000 0000e1c7 c08145c0 f68b4e00 [248401.076122] f6ac4b60 f68cac14 f68cac18 ffffffff f6a2df30 c056f776 c0748e80 f68cac1c [248401.076133] Call Trace: [248401.076157] [<c056f776>] __mutex_lock_slowpath+0xc6/0x130 [248401.076163] [<c056f690>] mutex_lock+0x20/0x40 [248401.076215] [<f8257c0a>] i915_gem_retire_work_handler+0x2a/0x70 [i915] [248401.076228] [<c0157a7e>] run_workqueue+0x6e/0x140 [248401.076244] [<f8257be0>] ? i915_gem_retire_work_handler+0x0/0x70 [i915] [248401.076251] [<c0157bd8>] worker_thread+0x88/0xe0 [248401.076258] [<c015c280>] ? autoremove_wake_function+0x0/0x40 [248401.076264] [<c0157b50>] ? worker_thread+0x0/0xe0 [248401.076270] [<c015bf8c>] kthread+0x7c/0x90 [248401.076275] [<c015bf10>] ? kthread+0x0/0x90 [248401.076283] [<c0104007>] kernel_thread_helper+0x7/0x10 I have modified xorg.conf file - added AccelMethod "uxa", put only one resultion in screen section, disabled all the modules in section Modules. Section "Device" Identifier "Configured Video Device" Boardname "Intel 845" Busid "PCI:0:2:0" Driver "intel" Screen 0 Vendorname "Intel" Option "AccelMethod" "uxa" EndSection Section "Monitor" Identifier "Configured Monitor" Vendorname "Samsung" Modelname "Samsung SyncMaster 171S/175S/170S/CX175S-AZ/LX175S" Horizsync 30-81 Vertrefresh 56-85 modeline "1280x1...@75" 135.0 1280 1296 1440 1688 1024 1025 1028 1066 +hsync +vsync Gamma 1.0 EndSection Section "Screen" Identifier "Default Screen" Device "Configured Video Device" Monitor "Configured Monitor" Defaultdepth 24 SubSection "Display" Depth 24 Virtual 1280 1024 Modes "1280x1...@75" EndSubSection EndSection Section "ServerLayout" Identifier "Default Layout" screen 0 "Default Screen" 0 0 EndSection Section "Module" # Load "glx" # Load "GLcore" # Load "dri" # Load "v4l" EndSection Section "ServerFlags" EndSection Nothing helps :( -- [i945G] karmic: INFO: task i915/* blocked for more than 120 seconds. https://bugs.launchpad.net/bugs/451518 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs