http://bugs.freedesktop.org/show_bug.cgi?id=20647





--- Comment #12 from Alex Deucher <ag...@yahoo.com>  2009-03-16 10:45:33 PST ---
(In reply to comment #11)
> I've been using 2 without a problem.
> 

ok.

> However, should a buggy app be able to make the Xserver go nuts like that? 
> i.e. consume 100% cpu even when the program is forcably killed and the Xserver
> not be able to be forcably killed?
> 

If the app uses GL, the 3D driver converts GL to hardware commands which are
fed to the chip.  Something about that command stream (perhaps in combination
with the 2D command stream from the 2D driver loaded by the xserver) is causing
the GPU to hang.  Once that happens generally, you're done.  The 2D driver is
generally stuck looping in an ioctl waiting for idle, etc. which is what causes
the CPU to spike.


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