Bug#406373: xserver-xorg-video-ati: [ia64] No direct rendering w/
Radeon R300 [FireGL X1]
alexdeucher at gmail.com
Fri Jan 12 09:36:02 PST 2007
On 1/12/07, Bryan Stillwell <bryan.stillwell at hp.com> wrote:
> Alex Deucher wrote:
> > On 1/11/07, Bryan Stillwell <bryan.stillwell at hp.com> wrote:
> >> However, when running in mergedfb mode, the right ~1/3rd of the second
> >> monitor doesn't work properly. The first monitor and the first ~2/3rds
> >> of the second monitor work great. Have you seen anything like that
> >> before, or should I file a separate bug on that? The best way I could
> >> describe it is garbage, but it seems like some of the graphics are
> >> trying to be displayed.
> > How wide is your mergedfb desktop? There are some width and height
> > limitations in the 3D engine.
> It is 3200x1200. I would say the 3D engine appears to have problems
> when X is between ~2667 and 3199. What are the limits? Are they in the
> card or in the driver?
The limits are in the hardware. They could potentially be worked
around in the driver, but it's non-trivial. IIRC, the register
bitfields would indicate 4096x4096, but I think in practice it's
2560x2560 on r300s and more (not sure of the exact limit off hand,
IIRC ~4000 or so) on r400s.
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