Broken dpm for HD6670 since kernel 3.15
Submitted by Edgar
Assigned to Default DRI bug account
Hello there, I'd like to report that since kernel 3.15 its nearly impossible to boot past the grub screen because post grub, during X init my monitor starts to endlessly power down/ power on. The only way to boot is to play around with the restart button, in arround 10 restarts, ~once I would get X to initialize properly. The other way is to put radeon.dpm=0 in the kernel-line. This way no errors occur, but I am left without dynamic power managemenent for the GPU.