Re: X color issues on PowerMac G5

Hello Jasper,

I'm assuming colors are already ok on console, so that's a good start.
The color-related issues you're seeing with X are probably being caused by
using a graphics card with a Little-Endian framebuffer on a CPU that is
Big-Endian.

But indeed, even in this case, colors should work fine on PowerPC64
machines, such as Blackbird, Talos II and probably G5, running in
Big-Endian mode.
AFAIK, this was tested only with OFWFB kernel driver. Is this the one
you're using? You can check that with:
dmesg | grep "VT(ofwfb)".

Next, make sure you are using xf86-video-scfb version 0.0.7, that has the
fix for the color issues.

Finally, if you have issues with Xorg Server (it used to crash in some
cases on PPC64 with the color fixes in OFWFB and SCFB), if you're using
version 1.20.x or older, you may need to patch it and rebuild it from ports.
You'll need to
get patch-hw_xfree86_common_xf86Helper.c and patch-render_picture.c from
https://people.freebsd.org/~luporl/gfx_patches/xorg-server/, copy them the
to 'files' directory of xorg-server in ports tree, rebuild and reinstall it.
If you have this last issue, please let us know and we can request these 2
patch files to be included in FreeBSD's xorg-server port's patches, to make
this easier for other users, while FreeBSD is still using 1.20.x.

Cheers,
Leandro

On Fri, Jul 29, 2022 at 4:18 AM Jasper Vinkenvleugel <
j.t.vinkenvleugel@proton.me> wrote:

> Hello,
>
> Please excuse me if I'm using this mailing list incorrectly.
>
> Recently I bought a PowerMac G5 with the intent of getting FreeBSD
> 13.1-RELEASE powerpc64 running on it. So far so good, but when I want to
> use X on the Nvidia FX 5200 Ultra the colors are completely off. For
> example in TWM all white surfaces are red. On the wiki I read about
> color-related issues with Blackbird and Talos II with the onboard graphics
> card and I wonder if similar problems might be going on here? The only
> other pointer I can find is 'scfb: LoadPalette 0' being spammed in the
> console.
>
> Kind regards,
>
> Jasper Vinkenvleugel
>
>
>