Re: modesetting vs intel in 10.0

[Robert Swindells <rjs%fdy2.co.uk@localhost>]

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.

Another option could be to just have a shell script that will
rename intel_drv.so to something that xorg won't find.

We have had multiple builds of ati and intel installed at the
same time that needed to be renamed to pick the one you wanted.

> 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.

One reason for using radeon is that it will make use of 2D hardware
on older cards, newer ones are 3D only.

> But maybe modesetting is mature enough (and intel bad enough)
> to warrant being the default for Intel GPUs.

I don't have a feel for which generations of Intel GPU have 2D or
video HW.

What Mesa settings are you using with all of this?