Re: radeon r300

On Sat, Jan 17, 2026 at 4:28=E2=80=AFAM Robert Swindells <[email protected]> w=
rote:
>
>
> Kevin Bowling <[email protected]> wrote:
> > I get the following with 10.1 or NetBSD 11.0_BETA (GENERIC) #0: Thu
> > Jan  8 10:53:08 UTC 2026
> > when starting X:
> >
> > [   104.512784] radeon0: autoconfiguration error: error: ring 0
> > stalled for more than 10000msec
> > [   104.512784] radeon0: warn: GPU lockup (current fence id
> > 0x0000000000000003 last fence id 0x0000000000000006 on ring 0)
> >
> > I'm able to get a working session with this file added to
> > /etc/X11/xorg.conf.d/20-radeon.conf:
> > Section "Device"
> >        Identifier "Radeon"
> >        Driver "modesetting"
> >        Option "AccelMethod" "none"
> > EndSection
> >
> > With the modesetting default of AccelMethod "glamor", X will not start =
with:
> > glamor requires at least 128 instructions (64 reported)
> >
> > So it seems the older EXA radeon might be preferable, but something is
> > going wrong in the kernel.  Has anyone looked into this drm stuff
> > recently?
>
> What happens if you set AccelMethod to EXA in your 20-radeon.conf file?

As far as I can tell only glamor is supported for modesetting.  If
setting EXA here, X does start but llvmpipe is still somewhat used and
things like glxinfo segfault.

If I boot with userconf to disable radeondrm, X seems to only come up
in VESA so not sure if another config is needed for user mode setting
or if that has been deprecated.

Regards,
Kevin