[Bug 247416] x11-servers/xorg-server: DRI2 fails on AMD Polaris 10

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=247416

--- Comment #26 from Niclas Zeising <zeising at FreeBSD.org> ---
I do not believe you had working graphics using amdgpu.ko even before all this

The dmesg you have posted, from the broken system, indicates that amdgpu.ko
does not attach properly to the device.  There might be an issue with swrast in
recent versions of mesa-dri, that used to work before, that was masking this.

Comment 8 only proves that the module (and firmware modules) load, not that
they attach or work.  Can you, as also requested by Jan, provide an Xorg.log
and a dmesg from a system when this was working.

Xorg will probe a multitude of drivers (xf86-video-*) to figure out what's
going on, and which is best.  Both xf86-video-ati and xf86-video-amdgpu
requires working kernel drivers though.

Without having proper logs, from a working system, to compare with the ones
from when it is not working, it is very hard to tell what's going on.

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