For all "Intel Ivy Bridge" user (Intel i5-3570K,  HD Graphics 4000)
Unity 3D (Compiz) and Gnome-Shell (Mutter) will crash!

Only 2D Desktop (Unity-2D, ) runs stable.
(KWIN not tested!)

Maybe it's time for a new bug report?
All Systems with integrated Intel HD Graphics 4000 randomly freezes in 
3D-Desktop (unity, gnome-shell).
The machine freezes completely, no mouse or keyboard response. no chance to 
switch tty1, tty2 ... Magic SysRq also not working... the machine is completely 
death.

Affected systems:

Michael (starkpc)
Intel Core i5 3570K 3.4GHz
Gigabyte Z77M-D3H

ramayer (rm-ubuntu)
Intel Core i5 3570K 3.4GHz
ASUS P8Z77-V

Cloudsheen (bensharman)
Intel Core i5 3570K 3.4GHz
Gigabyte Z77X-UD3H

max (maxozilla)
Intel Core i5 3570K 3.4GHz
MSI Z77A-G43

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https://bugs.launchpad.net/bugs/993187

Title:
  ubuntu 12.04 64bit completely freezes frequently

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