I tried 12.1-Release first. Then 12.2-RC3. Then 13-Current from the 2020.10.22. snapshot.
The closest to anything promising was the current. In there, the amdgpu kernel modul told me to use the module parameter for experimental support. I used kenv to provide the neccesary parameter.
Then loaded the amdgpu module with kldload.
Then tried to start Xorg with the previously generated Xorg.conf.
Than I had a nice crash.
Now I use ubuntu 20.04. It has some "vesa"-level graphics. As far as I can tell, no acceleration so far:
Playing: test.avi
Video --vid=1 (mpeg4 512x384 29.970fps)
libEGL warning: DRI2: failed to authenticate
[vo/gpu/opengl] Suspected software renderer or indirect context.
[vo/gpu/opengl] Suspected software renderer or indirect context.
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
[vo/vdpau] Error when calling vdp_device_create_x11: 1
[vo/xv] No Xvideo support found.
[vo/sdl] Using opengl
[vo/sdl] Warning: this legacy VO has bad performance. Consider fixing your graphics drivers, or not forcing the sdl VO.
AO: [pulse] 48000Hz stereo 2ch float
VO: [sdl] 512x384 yuv420p
Maybe there will be drivers on linux sooner. I can't tell. But if it's possible, I'd rather use FreeBSD (and mate) as a desktop.
The power consumption is amazingly low of this piece of hardware. So I would definitely want to use this little box for a desktop as well if possible.
