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The Screen freezes with the exception of movement by mouse, I went to a virtual tty with Ctrl+Alt+f2 and reran Unity which unfroze the desktop.

This is the tail of my /var/log/syslog:

praveen@praveen-XPS-L412Z:~$ tail -f /var/log/syslog
Jun 10 11:17:01 praveen-XPS-L412Z CRON[25625]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Jun 10 11:22:15 praveen-XPS-L412Z kernel: [ 6184.595684] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung
Jun 10 11:22:15 praveen-XPS-L412Z kernel: [ 6184.595690] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state
Jun 10 11:23:17 praveen-XPS-L412Z gnome-session[7781]: WARNING: Application 'compiz.desktop' killed by signal 9
Jun 10 11:23:17 praveen-XPS-L412Z gnome-session[7781]: WARNING: App 'compiz.desktop' respawning too quickly
Jun 10 11:23:17 praveen-XPS-L412Z gnome-session[7781]: CRITICAL: We failed, but the fail whale is dead. Sorry....
Jun 10 11:23:18 praveen-XPS-L412Z gnome-session[7781]: WARNING: App 'compiz.desktop' respawning too quickly

Please let me know about a permanent fix as this recurs.

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  • I got this error with Ubuntu 12.10 64 bit, and fixed it with sudo apt-get update and sudo apt-get dist-upgrade installing everything it recommended, and rebooting.
    – Eric Leschinski
    Jan 5, 2014 at 16:27

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