https://bugs.freedesktop.org/show_bug.cgi?id=66963
--- Comment #233 from Francisco Pina Martins f.pinamartins@gmail.com --- @lockheed:
The frosting screen forced me to do a reboot, since after it happened, X became unusably slow.
I am using the stable version of mesa: 10.1.3-1 I have used mesa-git in the past (well before DPM), to squeeze a bit of extra performance from my card. But since this is no longer my main machine I have reverted to stable packages in order to lighten up the maintenance burden. Let's hope DPM starts working fine on your card too.