[Bug 357987] [NEW] random segfaults on unactivity periods

[Jaime Sánchez]

Public bug reported:

Binary package hint: xserver-xorg-video-intel

During RANDOM unactivity periods xorg restarts because segfaults of
intel driver. Sometimes the computer is 4 hours idle and all is fine, no
errors, sometimes is 20 minutes idle and xservers restarts, and back to
the login screen, with all the programs (that were open) closed.

kernel: linux-image-2.6.28-11-generic              2.6.28-11.41  (distribution kernel)
driver: server-xorg-video-intel  2:2.6.3-0ubuntu8  
xorg version: 1:7.4~5ubuntu18 
desktop: kde4.2.2
hardware: motherboard asus p5e-vm with g35 intel integrated graphics
other: i tried UXA and EXA accel methods, both are causing the same error. I tried to disable
powerdevil daemon too.

kern.log:

Apr  8 21:59:54 ulises kernel: [17719.892633] Xorg[2662]: segfault at 10 ip b78d34c9 sp bfa8c990 error 4 in libdrm_intel.so.1.0.0[b78d2000+8000]
Apr  8 21:59:55 ulises kernel: [17720.248134] [drm:i915_get_vblank_counter] *ERROR* trying to get vblank count for disabled pipe 1
Apr  8 21:59:57 ulises kernel: [17722.484786] [drm:i915_setparam] *ERROR* unknown parameter 4
Apr  8 22:13:26 ulises kernel: [18531.282452] [drm:i915_get_vblank_counter] *ERROR* trying to get vblank count for disabled pipe 1
Apr  8 22:13:26 ulises kernel: [18531.285030] mtrr: no MTRR for d0000000,10000000 found

kdm.log:

Backtrace:
0: /usr/bin/X(xorg_backtrace+0x3b) [0x813518b]
1: /usr/bin/X(xf86SigHandler+0x55) [0x80c7be5]
2: [0xb806f400]
3: /usr/lib/xorg/modules/drivers//intel_drv.so [0xb7925f9b]
4: /usr/lib/xorg/modules/drivers//intel_drv.so(i830_crtc_dpms_video+0x4b) [0xb792601b]
5: /usr/lib/xorg/modules/drivers//intel_drv.so [0xb790ee2e]
6: /usr/bin/X(xf86DPMSSet+0x80) [0x80ecf40]
7: /usr/bin/X(xf86SaveScreen+0x3b) [0x80ed75b]
8: /usr/bin/X(dixSaveScreens+0x2df) [0x807bb5f]
9: /usr/bin/X(DPMSSet+0x10b) [0x80c743b]
10: /usr/bin/X [0x8132406]
11: /usr/bin/X [0x8132747]
12: /usr/bin/X(WaitForSomething+0x547) [0x8132d97]
13: /usr/bin/X(Dispatch+0x7e) [0x808d2be]
14: /usr/bin/X(main+0x3bd) [0x80722ed]
15: /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0xb7c3b775]
16: /usr/bin/X [0x80717a1]
Saw signal 11.  Server aborting.

daemon.log:

Apr  8 21:59:55 ulises kdm[2650]: X server for display :0 terminated unexpectedly
Apr  8 21:59:55 ulises console-kit-daemon[2508]: WARNING: Unable to activate console: No such device or address 
Apr  8 21:59:56 ulises acpid: client connected from 10085[0:0]

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

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random segfaults on unactivity periods
https://bugs.launchpad.net/bugs/357987
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