X still freezing once in a while

[Adam Jackson]

On Wed, 2009-04-29 at 12:06 -0700, Per Bothner wrote:
> Every other day or so, X freezes.  This has been happening for a while,
> while keeping Rawhide current.  It's on a Lenovo T400, with the
> Intel GM45 Express Chipset.
> 
> Lately I've been running with Desktop Effects enabled; I just
> disabled them to see if that would make things more stable.
> 
> The symptoms:  Screen freezes (I can't say for sure whether things like
> the clock get updated); mouse can move but doesn't change icon; mouse
> clicks and keyboard inputs are ignored.  I can ssh in, and it shows Xorg
> taking about 100% of one CPU.  It seems to happen when I do certain
> things in Firefox (most recently I tried to open an image on lwn.net in
> a new window).  No messages in Xorg.0.log or /var/log/messages

When this happens, where does gdb or profile show the server spending
its time?

- ajax
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