Re: Poor performance with Alder Lake graphics (ThinkPad T16)

On Fri, Apr 7, 2023 at 11:05 AM Jan Beich <jbeich@freebsd.org> wrote:

> Kevin Oberman <rkoberman@gmail.com> writes:
>
> >> Looks like OpenGL acceleration failed under Xorg for some reason.
> >> Maybe caused by https://github.com/freebsd/drm-kmod/issues/175
> >
> > Nope. glxinfo looks fine.
>
> glxinfo is X11-specific where "direct rendering" is often misleading.
> Indirect GLX hasn't been used by default for >10 years.
>
> See also https://gitlab.freedesktop.org/mesa/mesa/-/commit/08bc3d175069
>          https://gitlab.freedesktop.org/xorg/xserver/-/commit/d0da0e9c3bb8
>
> > Can't believe that this graphics is MUCH worse than my 12 year old Ivy
> Lake
> > system.
>
> On my hardware Xorg is 20% slower, see https://reviews.freebsd.org/P501
> This is *without* TearFree and X11 compositor (e.g., picom).
>

Just tried an obvious tool:
> xdriinfo
Screen 0: swrast

Does not look like much support, either by misconfiguration or lack of
support for Alder Lake graphics. I would think that software rasterization,
alone, is really going to slow things down. I assume it means no
OpenGL/Mesa.


-- 
Kevin Oberman, Part time kid herder and retired Network Engineer
E-mail: rkoberman@gmail.com
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