Bug#992617: xserver-xorg-video-radeon: Screen rotate doesn't work

[Kari Pahula]

On Fri, Aug 27, 2021 at 12:20:55PM +0200, Michel Dänzer wrote:
> What else changed on the system since it was last working? E.g. if
> Mesa packages were upgraded, it's worth trying to downgrade
> those. Or maybe xserver-xorg-video-radeon.

Ok, I downgraded libegl-mesa0, libgdbm1 and libgl1-mesa-dri to version
18.3.6-2+deb10u1.  It's not the version I had in run prior to this all
but it was what was readily available in Debian.

I'm having no issues after the downgrade.  startx worked right away,
acceleration works, rotate works and no stalls reported in dmesg log.