Hi Denver,

I have a sense you may have two separate bugs.  Or, rather, the problems
you mention are distinct and can be investigated separately.  For this
bug report let's focus on the X crash.

You mentioned that X crashed back to the login screen.  That will almost
always result in a terse backtrace written to the end of your
/var/log/Xorg.0.log or /var/log/Xorg.0.log.old, however nether of those
files attached to this bug report show that error.  Please see if you
can reproduce the crash and then collect the log file and attach it
here.

If it is crashing, what we need is a full backtrace.  Directions for
gathering backtraces are at http://wiki.ubuntu.com/X/Backtracing.

There were a number of bugs filed about X crash issues around the same
time as yours, which were due to a bug in the -synaptics driver and
fixed with xserver-xorg-input-synaptics 1.5.99~git20120220-0ubuntu3.  So
you might want to try updating first and verify you're still seeing the
crash with that version installed.

Regarding the 100% CPU bug, *typically* that is due to a client
application rather than X itself.  Sometimes xrestop can give a sense of
what client apps are using lots of resources.  Otherwise, just start
randomly killing your X clients until the X cpu usage drops; whatever
you last killed will be the wayward client.  Then file a new bug against
that program.  Or, if you're still unable to narrow it down, post a new
bug report against X to focus on that issue and we'll follow up from
there.


** Package changed: xorg (Ubuntu) => xserver-xorg-video-ati (Ubuntu)

** Changed in: xserver-xorg-video-ati (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/933788

Title:
  X crashes or spins on occasion

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