X still freezing once in a while

[Per Bothner]

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

This seems a lot like this bug:
https://bugzilla.redhat.com/show_bug.cgi?id=473347
However, the comments say that that bug only happens with EXA,
and I'm definitely running UXA (according to Xorg.0.log).

It could be this, but it doesn't quite match:
https://bugzilla.redhat.com/show_bug.cgi?id=496516
I do see these messages, but they happen *hours* before the freeze.
Apr 28 21:21:28 localhost kernel: [drm:i915_gem_object_bind_to_gtt] 
*ERROR* GTT full, but LRU list empty
Apr 28 21:21:28 localhost kernel: [drm:i915_gem_object_pin] *ERROR* 
Failure to bind: -12
Apr 28 21:21:28 localhost kernel: [drm:i915_gem_evict_something] *ERROR* 
inactive empty 1 request empty 1 flushing empty 1
And there are no "bo map failed" messages in Xorg.0.log.

File a new bug?
-- 
	--Per Bothner
per at bothner.com   http://per.bothner.com/