workaround of i915.modeset is effective, but disable gnome-shell and 3D
acceleration

when it happens, I lose even the virtual console (ctrl + F1, Ctrl + F2, etc 
...), so it is impossible to work on computers. 
To avoid the hardware reset I have to log in and issue the command to reboot 
without seeing.

I might try to login via ssh from another machine, but once you do not
know what to watch. What might be useful to developers?

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https://bugs.launchpad.net/bugs/949130

Title:
  Display corrupts and flashes when changing resolution on GMA X3000

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