Radeon Mobility X1600 texture garbage w/ compiz skydome

[Corbin Simpson]

Michel Dänzer wrote:
> On Sun, 2008-09-21 at 13:35 +0200, Soeren Sonnenburg wrote:
>> ( this is a resend to xorg-driver-ati. this message got posted to xorg
>> as I was not aware this list exists as it is not listed on
>> http://lists.freedesktop.org/mailman/listinfo/ )
> 
> lists.x.org != lists.freedesktop.org :)
> 
> 
>> I am on debian-experimental (xorg 1.5, mesa 7.1, xserver-xorg-video-ati
>> 6.9.0+git20080826.a3cc1d7a-2 ) and running compiz 0.7.6. While things
>> work mostly OK, the skydome displays random garbage and the bottom and
>> top texture of the cube/cylinder displays more or less the texture
>> distorted (some lines are ok, some not) + random garbage inbetween.
> 
> [...]
> 
>> (**) RADEON(0): Option "GARTSize" "64"
>> (**) RADEON(0): Option "FBTexPercent" "0"
> 
> Try without these two options.
> 
> For the former, values larger than 32 (which is also the default now)
> aren't handled correctly automatically for PCIe cards.
> 
> For the latter, the Mesa r300 driver doesn't properly handle GART
> texturing, so it needs to have texture space in video RAM.
> 
> 

For compiz, make sure your skydome isn't larger than MAX_TEX_SIZE/2 in
any dimension. For your chipset, it would be 2048x2048. Any larger, and
you'll get a very, um, "fun" skydome glitch. (Compiz doesn't properly
check this...)

Also, for UT2004, turning off FBTexPercent should do the trick.

~ C.

-- 
~ Corbin Simpson
<MostAwesomeDude at gmail.com>