[Bug 257335] graphics/drm-fbsd13-kmod

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 22 Jul 2021 13:59:50 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=257335

            Bug ID: 257335
           Summary: graphics/drm-fbsd13-kmod
           Product: Ports & Packages
           Version: Latest
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: Individual Port(s)
          Assignee: x11@FreeBSD.org
          Reporter: freebsd@frost.kiwi
             Flags: maintainer-feedback?(x11@FreeBSD.org)
          Assignee: x11@FreeBSD.org

Created attachment 226612
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=226612&action=edit
Screenshot showing heavy image corruption from the video player "mpv"

FreeBSD shows heavy artifacting and texture corruption on i915 hardware with
mesa's new Gallium3D driver "Crocus".
This issue is tracked as a mesa issue here:
"Crocus on GM45: texture corruption, bad memory reads and GPU Hangs" (
https://gitlab.freedesktop.org/mesa/mesa/-/issues/5093 )
It has been suggested by a mesa dev, that the cause may be on FreeBSD's side
due to "missing some interfaces [...]".
That's why I cross-post this as a bug here.

TL;DR:
With a Laptop with a GM45 chipset, the GMA 4500 MHD iGPU, on the latest kernel,
with the latest drm-fbsd13-kmod and the latest mesa-devel, using crocus as the
graphics driver to launch any graphical program results in heavy artifacting
when a texture is displayed.

Attached is a screenshot of the videoplayer "MPV", which shows heavy corruption
of the image. Be it Video game or browser, everything shows this corruption, if
crocus is used.

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