Display completely locks up at random

[Julian Edwards]

Apparently at random my screen will just lock up (although sometimes the mouse pointer will still move). It is exacerbated by using Google Hangouts and Skype but is not limited to using them.

The Xorg logs shows a load of errors and a stack trace.

I can ssh into the box when this happens and see that the Xorg process is using 100% of a CPU core. This bug report is generated by sshing in to get the relevant data.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xserver-xorg-core 2:1.11.4-0ubuntu10.2
ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18
Uname: Linux 3.2.0-25-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
Date: Mon Jun 25 18:45:33 2012
ExecutablePath: /usr/bin/Xorg
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
SourcePackage: xorg-server
UpgradeStatus: Upgraded to precise on 2012-01-16 (160 days ago)