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Date:      Sat, 20 Mar 2021 22:30:02 +0000
From:      bugzilla-noreply@freebsd.org
To:        ports-bugs@FreeBSD.org
Subject:   [Bug 254446] graphics/drm-fbsd12.0-kmod: (radeon) drmn0: forbidden register 0x00028b90 at 1259
Message-ID:  <bug-254446-7788@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D254446

            Bug ID: 254446
           Summary: graphics/drm-fbsd12.0-kmod: (radeon) drmn0: forbidden
                    register 0x00028b90 at 1259
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: x11@FreeBSD.org
          Reporter: joerg@FreeBSD.org
             Flags: maintainer-feedback?(x11@FreeBSD.org)
          Assignee: x11@FreeBSD.org

OS: FreeBSD 12.2-STABLE
HW: ATI Radeon HD 2400 PRO (RV610 GPU)

After 12.2 upgrade, using the radeonkms module as shipped with the kernel,
everything worked but I always got that

libGL error: failed to load driver: radeon

error for all applications using OpenGL, and in general, graphics appeared =
to
be slow (e.g. when switching virtual screens, xterm took a noticable time to
redraw a terminal window).

Research indicated to use drm-fbsd12.0-kmod instead of the modules shipped =
with
kernel.

Initial attempts to use these resulted in the system quickly panicking afte=
r a
few minutes of X11 operation. Rebuilt all modules (and GPU firmware) today,=
 now
it appears to be stable, and the dreadful "failed to load driver" message is
gone. Overall graphics performance appears OK now. Most OpenGL applications=
 to
work well. However, cad/horizon-eda (which requires OpenGL 3.2 as minimum)
triggers kernel errors, and yields garbage in its drawing areas.

forbidden register 0x00028b90 at 1215
Invalid command stream !

Using the deprecated system-supplied kms modules, horizon-eda worked without
problems.

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