System freezes while watching a streaming video [xubuntu]

[nakki]

I was watching some streaming videos by a while with chromium-browser in full screen mode on my xubuntu precise, when video freezed and audio was blocked for few seconds. Then the sound started again but in fits and starts...So I pushed the power button a lot of times, the screen went black and after a couple of minutes the pc shutted down.
I don't know if there is a bug in the kenel or in the X server, so i attached both logs...

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+7ubuntu7
ProcVersionSignature: Ubuntu 3.2.0-9.16-generic 3.2.1
Uname: Linux 3.2.0-9-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
Date: Fri Jan 20 18:34:43 2012
InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
ProcEnviron:
 PATH=(custom, no user)
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: xorg
UpgradeStatus: Upgraded to precise on 2012-01-18 (1 days ago)

[Bryce Harrington (bryce)]

Yep, looks like you had a GPU lockup.

[ 12024.839] [mi] EQ overflowing. The server is probably stuck in an infinite loop.
[ 12024.839]
Backtrace:
[ 12024.863] 0: /usr/bin/X (xorg_backtrace+0x26) [0x460566]
[ 12024.863] 1: /usr/bin/X (mieqEnqueue+0x201) [0x45a941]
[ 12024.863] 2: /usr/bin/X (xf86PostMotionEventM+0xa3) [0x4805d3]
[ 12024.863] 3: /usr/lib/xorg/modules/input/evdev_drv.so (0x7f7abca2b000+0x5f23) [0x7f7abca30f23]
[ 12024.863] 4: /usr/lib/xorg/modules/input/evdev_drv.so (0x7f7abca2b000+0x65fb) [0x7f7abca315fb]
[ 12024.863] 5: /usr/bin/X (0x400000+0x6da67) [0x46da67]
[ 12024.863] 6: /usr/bin/X (0x400000+0x121f2e) [0x521f2e]
[ 12024.863] 7: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f7ac421e000+0x10060) [0x7f7ac422e060]
[ 12024.863] 8: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/nvidia_drv.so (0x7f7abdf44000+0x896c0) [0x7f7abdfcd6c0]
[ 12024.863] 9: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/nvidia_drv.so (0x7f7abdf44000+0x8b2b5) [0x7f7abdfcf2b5]
[ 12024.863] 10: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/nvidia_drv.so (0x7f7abdf44000+0xf4ac2) [0x7f7abe038ac2]
[ 12024.863] 11: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/nvidia_drv.so (0x7f7abdf44000+0xf4e65) [0x7f7abe038e65]
[ 12024.863] 12: /usr/lib/x86_64-linux-gnu/xorg/extra-modules/nvidia_drv.so (0x7f7abdf44000+0x48237c) [0x7f7abe3c637c]
[ 12024.863] 13: /usr/bin/X (0x400000+0xe081c) [0x4e081c]
[ 12024.863] 14: /usr/bin/X (0x400000+0x2c87e) [0x42c87e]
[ 12024.863] 15: /usr/bin/X (0x400000+0x2fb89) [0x42fb89]
[ 12024.863] 16: /usr/bin/X (0x400000+0x232fe) [0x4232fe]
[ 12024.863] 17: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xed) [0x7f7ac314730d]
[ 12024.863] 18: /usr/bin/X (0x400000+0x235ed) [0x4235ed]
[ 12061.102]
Backtrace:
[ 12061.102] 0: /usr/bin/X (xorg_backtrace+0x26) [0x460566]
[ 12061.102] 1: /usr/bin/X (0x400000+0x64b6a) [0x464b6a]

Sounds similar to a couple other bugs recently reported. Unfortunately neither of the logs tell what GPU error you hit so impossible to say if it's a new bug or dupe.

Are you able to reproduce this bug? If so, for GPU lockup bugs what you need to provide is:

 * sudo dmesg > dmesg.txt
 * /sys/kernel/debug/dri/0/i915_error_state
 * /var/log/Xorg.0.log

These should be collected *while* the machine is locked up (or shortly thereafter if it recovers on its own). You might need to SSH into the machine to collect them.

[nakki (titibanjekistan)]

In /sys/kernel/debug/ there isn't a dri folder. Previous attached file Xorg.log is a part of Xorg.0.log, the part in the moment of the freeze.

[nakki (titibanjekistan)]

Why does it affects xserver-xorg-video-intel (Ubuntu)? I don't have a intel video card, but an nVidia one.

[nakki (titibanjekistan)]

Happened again watching a youtube 720p video...
In a moment the screen was black and the audio goes in a little and repetitive loop. After a while the image came again then blank, audio came back and relooped a piece of it. For few minutes this was the situation, then I pushed the power button a couple of times and slowly the system went down. This time i had no compiz activated.
I attached the full log of the session.

[Bryce Harrington (bryce)]

Ah yes, nvidia not intel. Reassigning.

[Bryce Harrington (bryce)]

Alberto, please escalate to NVIDIA when you get a chance.

[nakki (titibanjekistan)]

Re-happened again listening a youtube video song on facebook's page.
I played the video then i scrolled down the page for reading others friends posts. After a while I scrolled up the page for watching the video, but all the screen became white and the audio went in a little loop. I tried to go on tty by pressing ctrl-alt-F1, but nothing happened. Then i tried to press the power botton to shut down the system like other times but it did nothing...

[Ivan Katanović (igadmile-deactivatedaccount)]

Have the same problem, using ubuntu 12.10 up to date, but happened also on 12.04. and earlier. It became really frequent on 12.10.

[Alberto Milone (albertomilone)]

Is this still an issue in recent driver releases?

[nakki (titibanjekistan)]

Hi Alberto, (Ciao Alberto sono italiano pure io...)
I have kubuntu 12.04.2 installed on my laptop and this bug never reappeared.

[Alberto Milone (albertomilone)]

Ok, Grazie ;)

I'm closing this bug report for now. Feel free to reopen it if it happens again.