Xorg freezes once a day, mouse and SSH still works

[Chris Polderman]

About once a day, Xorg freezes on me. Running Xubuntu 12.04 on a dell L502X laptop.

The mouse is still moveable and I am able to SSH into the laptop but suspend/resume or using ctrl-alt-F1 and ctrl-alt-F7 does not work anymore.

I use the acpi_call module to disable the second GPU (nVidia) as it cuts down the fan noise and saves energy/battery.

I had hopes the 3.2.0-25-generic kernel would bring a fix to this (see bug 975689) but it keeps occurring. Incidentally but regularly (about once every 1-2 days).

The Xorg.0.log shows:

[ 64680.675] [mi] EQ overflowing. Additional events will be discarded until existing events are processed.
[ 64680.676]
Backtrace:
[ 64680.679] 0: /usr/bin/X (xorg_backtrace+0x26) [0x7eff3e087866]
[ 64680.679] 1: /usr/bin/X (mieqEnqueue+0x263) [0x7eff3e067f43]
[ 64680.679] 2: /usr/bin/X (0x7eff3deff000+0x62934) [0x7eff3df61934]
[ 64680.679] 3: /usr/lib/xorg/modules/input/evdev_drv.so (0x7eff384dc000+0x5d88) [0x7eff384e1d88]
[ 64680.679] 4: /usr/bin/X (0x7eff3deff000+0x8ae07) [0x7eff3df89e07]
[ 64680.679] 5: /usr/bin/X (0x7eff3deff000+0xb0d4a) [0x7eff3dfafd4a]
[ 64680.679] 6: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7eff3d225000+0xfcb0) [0x7eff3d234cb0]
[ 64680.679] 7: /lib/x86_64-linux-gnu/libc.so.6 (ioctl+0x7) [0x7eff3c183d27]
[ 64680.679] 8: /usr/lib/x86_64-linux-gnu/libdrm.so.2 (drmIoctl+0x28) [0x7eff3a71b1a8]
[ 64680.679] 9: /usr/lib/x86_64-linux-gnu/libdrm_intel.so.1 (0x7eff3a09f000+0x7c89) [0x7eff3a0a6c89]
[ 64680.680] 10: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7eff3a2bc000+0xb502) [0x7eff3a2c7502]
[ 64680.680] 11: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7eff3a2bc000+0x1246a) [0x7eff3a2ce46a]
[ 64680.680] 12: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7eff3a2bc000+0x32dc3) [0x7eff3a2eedc3]
[ 64680.680] 13: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7eff3a2bc000+0x38f18) [0x7eff3a2f4f18]
[ 64680.680] 14: /usr/bin/X (0x7eff3deff000+0x116444) [0x7eff3e015444]
[ 64680.680] 15: /usr/bin/X (0x7eff3deff000+0x10e9c4) [0x7eff3e00d9c4]
[ 64680.680] 16: /usr/bin/X (0x7eff3deff000+0x4e7a1) [0x7eff3df4d7a1]
[ 64680.680] 17: /usr/bin/X (0x7eff3deff000+0x3d6aa) [0x7eff3df3c6aa]
[ 64680.680] 18: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xed) [0x7eff3c0ba76d]
[ 64680.680] 19: /usr/bin/X (0x7eff3deff000+0x3d99d) [0x7eff3df3c99d]
[ 64680.680] [mi] These backtraces from mieqEnqueue may point to a culprit higher up the stack.
[ 64680.680] [mi] mieq is *NOT* the cause. It is a victim.
[ 64682.805] [mi] EQ overflow continuing. 100 events have been dropped.
[ 64682.805]

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18
Uname: Linux 3.2.0-25-generic x86_64
NonfreeKernelModules: acpi_call
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
Date: Tue Jun 19 10:45:05 2012
InstallationMedia: Xubuntu 12.04 "Precise Pangolin" - Beta amd64 (20120228)
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: No upgrade log present (probably fresh install)

[Chris Polderman (chris-polderman)]

Sorry but I dismissed the "things to append" text. What logs / info should I append?

Thanks!

Chris

[Timo Aaltonen (tjaalton)]

Please enable the -proposed repository, and install the kernel found there (-26). It has further fixes that might fix it.

[Chris Polderman (chris-polderman)]

Will do, thanks!

Chris

[Chris Polderman (chris-polderman)]

After enabling the -proposed repo experienced 1,5 day without hangup.

I will test it for some more days. If everything seems stable, I will report back!

Chris

[Chris Polderman (chris-polderman)]

I am declaring this bug as solved.

It has been stable for the entire last week (8h/day developing and keeping it in suspend mode going home).

Thanks!

Chris

[DDC (coquet)]

I'm still suffering from this problem with -27. X freezes for me once every 2-3 days. The symptons are as you describe. It seems to be a regression from 11.10.

3.2.0-27-generic #43-Ubuntu SMP Fri Jul 6 14:25:57 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

At the time of the freeze /sys/kernel/debug/dri/0/i915_error_state says "no error state collected"

I've installed mainline 3.4 to see if the problem goes away.

[Chris Polderman (chris-polderman)]

The Xorg.log also the same as me (the stack trace bit)? The system has been solid for me in the mean time.

I am running happily on (relevant bits fro uname -a):

3.2.0-27-generic #43-Ubuntu SMP Fri Jul 6 14:25:57 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

Chris

BTW: the /sys/kernel/debug/dri/0/i915_error_state always says "no error state collected" on my laptop.

[DDC (coquet)]

I'm using 3.4.0-030400-generic from the mainline PPA and I haven't had a single freeze since I installed it. I've been using the machine a lot more than normal over the last week as well.

[Timo Aaltonen (tjaalton)]

Closing the bug, thanks Chris for testing and reporting back!

DDC, please file a new bug if you haven't already.