Re: modesetting vs intel in 10.0

[David Brownlee <abs%absd.org@localhost>]

On Fri, 7 Jul 2023 at 21:39, nia <nia%netbsd.org@localhost> wrote:
>
> On Fri, Jul 07, 2023 at 08:18:18PM +0100, David Brownlee wrote:
> > On Fri, 7 Jul 2023 at 19:43, nia <nia%netbsd.org@localhost> wrote:
> > >
> > > After some testing on a Skylake machine, I've concluded
> > > that xf86-video-modesetting is far superior to xf86-video-intel
> > > on that generation of Intel hardware - the most obvious thing
> > > is that modesetting has functional VSync and superior 3D performance
> > > with less tearing.
> > >
> > > Only problem is that we default to intel, modesetting you need
> > > to choose explicitly through xorg.conf.
> > >
> > > I also found similar problems in "radeon", but found that
> > > modesetting would somehow pick a display mode that the monitor
> > > didn't support. Maybe this is actually a drmkms bug - I'm not
> > > sure.
> > >
> > > But maybe modesetting is mature enough (and intel bad enough)
> > > to warrant being the default for Intel GPUs.
> >
> > Could we start with some form of whitelist to pick modesetting over intel?
> >
> > David
>
> Maybe GPUs released after intel became abandonware in 2014 or so...

Picking up on this, particularly with netbsd-10 looming, I think we
should at least whitelist some known good-with-modesetting Intel GPUs,
with a plan to swapping over to whitelisting keep-on-intel Intel over
time.

Does anyone have any better thoughts?

David