When reporting X issues, please always attach your Xorg.0.log. Also,
when reporting crashes please remember to attach backtraces, because we
cannot begin troubleshooting without having that info. See
http://wiki.ubuntu.com/DebuggingXorg for details on this.
As I'm sure you read in bug #195843, upstream says that INTEL_BATCH=1 is
not supported and can make a system less stable, so we would not
consider that an acceptable fix for this issue - it might result in
making your specific system more stable by default, but make everyone
else's less stable. Also, I suspect INTEL_BATCH=1 may not have solved
your issue, just hidden it.
It would also be good to rule out memory issues, since bad RAM can
typically exhibit problems like this. Please run a memory checker to
verify your memory is ok. If it is, then attach the Xorg.0.log and
backtraces.
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: New => Incomplete
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X.org and all tty killed randomly, computer nearly unusable
https://bugs.launchpad.net/bugs/206049
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