(In reply to Nicolai H�hnle from comment #2)
> Thanks for the report. Did the messages
> 
> [43513.525167] [drm:si_dpm_set_power_state [radeon]] *ERROR* si_set_sw_state
> failed
> [43982.380508] [drm:si_dpm_set_power_state [radeon]] *ERROR*
> si_restrict_performance_levels_before_switch failed
> 
> occur at the same time as the stutter? That would point at a kernel problem.

No messages appeared on my screen, what I have noticed is that whenever this
freezing occurs, so does my entire system essentially (I can still hear audio
from Skype or Mumble but I can't interact with things)...however those messages
seem familiar..ahh I know. I think I have seen those messages occasionally show
up on my screen when I log out/log back in. I think I started getting this
since the 4.1 kernels....

I am not really sure what I can do to further help you but please let me know!

Although, this portion is offtopic. I have another machine with an AMD 6570 or
something and those messages would occasionally show up on Linux Mint 17.1 and
the kernel that one uses is 3.18.