https://bugs.freedesktop.org/show_bug.cgi?id=91880
--- Comment #68 from Julian jsbansen@gmail.com --- (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