Works for me.
The Default test passed OK. There is a reported issue with the Performance test (not kernel related) so I can't provide performance data.
AMD 965, x86_64 work station, Plasma DE, X-server, nVidia card GTX 650 (GK107) + nVidia RPM's from Negativo17
Not a big issue but I still have the problem of logging back in to my Plasma DE after logging out. Dropping to a shell I can get around this. Never had this with 5.1.x FWIW nVidia card negativo17 RPM's and I still have not found anything of use in the logs.
Apart from that all looks good and the systems shuts down OK now.
I have had to roll back to 5.1.20
When I logout of Plasma DE I get a black screen, same when trying to shut the system down. I have to drop to a shell to do anything. Nothing of use was found in my logs. FWIW nVidia card, negativo17 RPM's as always..