[Nouveau] [Bug 98630] Bad color and glitches on PPC64

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98630

--- Comment #8 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Mingcong Bai from comment #5)
> (In reply to Ilia Mirkin from comment #4)
> > Probably RGB vs BGR confusion. Can you create an apitrace of the problem?
> > I'll need to give this a whirl on my G5 ...
> 
> Is it an application related issue then?

Nope. Just the trickiness of dealing with a BE cpu and a
LE-but-kinda-BE-sometimes GPU. Unfortunately I don't have a clear model in my
head of precisely what all the "BE" flag flips on these GPUs, which makes
things much trickier.

> > ... (hm, if I can - I have a GeForce FX 5200 in mine). I should try to track
> > down a PCI nv4x that I can plug in.
> 
> Is it a Quad? I believe they are pretty cheap these days...

It's a PowerMac7,2 IIRC. It has an AGP slot (with the FX 5200) and some number
of PCI slots. I glanced at nv4x boards, but they're above my tolerance of
things I buy for the purpose of developing free drivers in my own time.

(In reply to Mingcong Bai from comment #6)
> Indeed, after removing nouveau_dri.so, the Plasma Discover at least renders
> the full interface now.
> 
> However, it still shows bad coloring.

Oh interesting. That means the confusion is in the DDX. (Or disagreement
between mesa and the DDX.) Please confirm that you're running a semi-recent
version of xf86-video-nouveau (e.g. 1.0.12), and actually verify that it says
NOUVEAU(0) in your xorg log.

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