Created attachment 358408 [details]
Description of problem:
With F12-alpha x86-64 desktop effects can't be enabled with kms enabled or disabled on this card.
Attaching lspci output (which also has -vvv output for the display card), xorg.0.log, /var/log/messages.
Created attachment 358409 [details]
/var/log/messages with kms enabled
Created attachment 358410 [details]
Xorg.0.log with kms enabled
This is the expected behaviour and not a bug, hopefully this will be available in a future release.