[Bug 267915] x11-wm/mutter: after graphics/mesa-* 21.3.8 -> 22.2.3 update OpenGL compositing fails on Intel Iris Pro

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=267915

Patricio Villar <patovm04@gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |patovm04@gmail.com

--- Comment #11 from Patricio Villar <patovm04@gmail.com> ---
OS: FreeBSD 13.1-RELEASE-p5
HW: Intel(R) Core(TM) i7-10510U - CometLake-U GT2 [UHD Graphics]
WM: Openbox, X11
DM: SDDM
Mesa 22.3.0

Hi everyone, I observe a similar situation that is very likely related. 
When I change TTY to any other than vt9 and then go back to X11, I lose
hardware acceleration.

If I run glxgears, it reports:
  libGL error: failed to authenticate magic 1
  libGL error: failed to load driver: iris

and CPU usage goes to the roof.

It's important to note that this doesn't happen when using drm-54-kmod. It only
started happening when I updated to the new drm-510-kmod.

Also, GPU accel comes back if I logout and then login back again...

So hopefully this helps bring some light to see where the problem originates

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