I have the same problem with one of my machines. Both are running 12.04.
As soon as I updated to kernel 3.2.0-39 and rebooted, the system became 
unstable as soon as the desktop appears... lots of errors start popping up, 
screen blinks and/or turns black, etc...

Went back to kernel 3.2.0-38 and it's fine again.
I also tried to go to the 3.5 kernel for precise pangolin, and got the same 
problem.

Machine with the problem:
ASUS P8H67-I + i5 2500T + 8 GB RAM (only integrated graphics)


I also have a dell laptop with kernel 3.2.0-39 without any problems.
This laptop has a core2duo, 4GB of RAM (only integrated graphics). It's a dell 
d630.


Any suggestions?

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https://bugs.launchpad.net/bugs/1157786

Title:
  Kernel release 3.2.0-39-generic hangs intel 64-bit X

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