(In reply to Alex Deucher from comment #67)
> (In reply to Julian from comment #65)
> > sclk_dpm_key_disabled = 1;
> > mclk_dpm_key_disabled = 0;
> > pcie_dpm_key_disabled = 1;
> > thermal_sclk_dpm_enabled = 1;
> > ==> NO LOCKUP - however, I periodically checked
> > /sys/kernel/debug/dri/0/radeon_pm_info and mclk never actually changed
> > (always 150000). Maybe mclk usually always changes based on sclk? With slck
> > locked, mclk wouldn't change either, even if unlocked.
> 
> What are you testing with?  You may not be producing enough memory load.

Every time I've ran a couple of 3D games, used google maps (which I've
previously used to cause the freeze; a few minutes are usually enough), and run
some video steams. Usually all at once.

Here's a screenshot of what radeontop looks like:
http://i.imgur.com/yQHXoFI.png