[Bug 15096] X freezes when using Compiz (or other 3D apps) with xserver-xorg-video-ati >1:6.6.3

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=15096





--- Comment #15 from Alex Deucher <agd5f at yahoo.com>  2008-05-18 11:04:22 PST ---
(In reply to comment #14)
> Sorry for the multiple posts but I just did another test where I only used
> 
>  Option "AccelMethod" "EXA"
> 
> because it was recommended in my report over at Launchpad.
> 
> The result was a much more fluent tuxracer that was actually playable.
> The downside however, is a much slower 2D rendering. For example when moving a
> window over an area of the desktop with icons, the background flickers.
> Also moving a window from one viewport to another on Compiz will result in a
> pretty rough transition.
> 
> It would be great if we could have the best of both worlds.
> Adding both options unfortunately doesn't do the trick.
> 

EXA preforms pretty well with the latest ati driver from git a recent X server.

The root of this problem in your case is that AGP sucks.  There are just too
many combinations of agp cards and chipsets that only work at specific settings
(some only work at 1x, others only work at 4x or 8x, etc.).  We've tried both
defaults in the driver, but someone's combination always breaks.


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