[Nouveau] nouveau on G5 Macs

[Jeroen Diederen]

Thanks. How do I find out what is used as compositor? I am using LXDE.

Ilia Mirkin schreef op 2020-06-22 20:18:
> OK. That's not tearing. That's like a bad pitch on an image.
> (Presumably you only find the second image, IMG_1968.jpg,
> problematic?)
> 
> I'm guessing you're using a GL-based compositor, which I fully expect
> to work poorly. Please try a non-compositing or XRender-based
> compositing environment.
> 
> Cheers,
> 
>   -ilia
> 
> On Mon, Jun 22, 2020 at 2:15 PM Jeroen Diederen <jjhdiederen at zonnet.nl> 
> wrote:
>> 
>> This is with 64k page size.
>> 
>> 
>> 
>> Ilia Mirkin schreef op 2020-06-22 19:27:
>> > I suspect screen tearing (as it's usually defined) is to be expected.
>> > Can you take a photo of what you're seeing, since I'm suspecting it's
>> > more than regular screen tearing?
>> >
>> > On Mon, Jun 22, 2020 at 12:08 PM Jeroen Diederen
>> > <jjhdiederen at zonnet.nl> wrote:
>> >>
>> >> Hi Ilia,
>> >>
>> >> I experience screen tearing for both 64k and 4k page size.
>> >> My iMac G5 has an nVidia Geforce FX 5200 Ultra GPU.
>> >>
>> >> Regards,
>> >> Jeroen
>> >>
>> >>   Ilia Mirkin schreef op 2020-06-22 17:25:
>> >> > Which GPU do you have? The NV40 AGP board (GeForce 6800) works
>> >> > particularly poorly. However as long as you go with 4k pages (and
>> >> > there's no real benefit to 64k pages for most applications), basic
>> >> > things should work. I wouldn't recommend using a GL-based compositor
>> >> > though.
>> >> >
>> >> > Which distortion are you talking about?
>> >> >
>> >> > Cheers,
>> >> >
>> >> >   -ilia
>> >> >
>> >> > On Mon, Jun 22, 2020 at 11:10 AM Jeroen Diederen
>> >> > <jjhdiederen at zonnet.nl> wrote:
>> >> >>
>> >> >> Hi all,
>> >> >>
>> >> >> I have been trying to solve nouveau issues on my iMac G5 for ages. As
>> >> >> far as I can understand it, there is a problem with nouveau and page
>> >> >> size mapping. I tried both 64K and 4K page size kernels and the the
>> >> >> result is always distorted video.
>> >> >> There is an old To-Do list, which says "fix the page size mapping
>> >> >> problem on G5/64 bit for exposing fifo regs" on
>> >> >> https://nouveau.freedesktop.org/wiki/ToDo/.
>> >> >>
>> >> >> Is there any chance that this bug will be fixed ? I am not a
>> >> >> programmer,
>> >> >> so I can't be of any help.
>> >> >>
>> >> >> Jeroen Diederen
>> >> >> _______________________________________________
>> >> >> Nouveau mailing list
>> >> >> Nouveau at lists.freedesktop.org
>> >> >> https://lists.freedesktop.org/mailman/listinfo/nouveau