[Bug 17996] EXA accelmethod crashes Xorg when viewing pictures.

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=17996





--- Comment #1 from Alex Deucher <agd5f at yahoo.com>  2008-10-09 23:27:57 PST ---
(In reply to comment #0)

> This particular bug pertains EXA crashing the Xserver when "viewing pictures".
> The best way to describe it is that the system becomes unresponsive as soon as
> panning of a picture (despite the program being used) starts. I have been able
> to SSH into the machine and see what processes are active. Xorg eats anywhere
> between 99-150% CPU (the laptop CPU is dual core). There is nothing out of the
> ordinary in system-log, dmesg and only one time I've been able to get something
> in Xorg.0.log about the Xserver entering an infinite loop, never too reliably,
> though. The "crash" always happens with any image file if zoomed in or at
> normal size when viewed on any program as soon as I start panning, the system
> becomes unresponsive, mouse jerky, I don't seem able to snap out of X
> [ctrl+alt+Fx].
> 

Sounds like a GPU lockup.

> This only happens when Option "AccelMethod" "EXA" is enabled in xorg.conf, when
> using XAA performance is noticeably slower in 2D in general, but X doesn't
> crash. I'm using Xorg-video-ati 6.9.0 release built from source against Xorg
> 1.5.0 on Fedora 9, the same happens with the driver built from GIT.

Does:
Option "renderaccel" "false"
help?

> 
> It may be worth noting that with XServer 1.4.99 EXA worked just fine, but with
> release 1.5 it does not.

when you say "just fine" do you mean "didn't used to hang" or something else? 
Any chance you could use git bisect on the xserver to track down what commit
between 1.4.99 and 1.5 broke things?


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