Tested on Linux Mint 18, with Sapphire Radeon R9 380X (AMDGPU), Sapphire Radeon R7 260X (radeon)
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Crashes and freezes can be due to some GPU states being unstable under certain workloads. This might be especially evident when using desktop environments that cause a moderate GPU load for 3D effects, or modern browsers that use GPU acceleration for some kinds of content.
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You want to force the GPU into low power or high performance state
This should work on recent systems with Radeon DPM support. Please do some more research to ensure that your system is supported.
An easy way to check is to run
cat /sys/class/drm/card0/device/power_dpm_force_performance_level
which will print out high low or auto. If the file does not exist, dpm is not enabled.
The scripts starting with agpu will set and read states for AMDGPU drivers, while those starting with radeon are for the radeon drivers.
agpufreq and radeonfreq will periodically print core and memory clocks.
agpulow and agpuhigh will set lowest and highest profiles.
radeonset low and radeonset high will do the same for radeon driver based cards.
AMDGPUPRO/set_freq.py will list available core and memory clocks. You will be able to choose which one to use, and the script sets them and starts outputting the current states.
Example:
gj@linux-beic ~/git/AMD-Linux-Power-Management/AMDGPUPRO (master) $ sudo ./set_freq.py
0: 300Mhz *
1: 473Mhz
2: 745Mhz
3: 829Mhz
4: 870Mhz
5: 903Mhz
6: 938Mhz
7: 1040Mhz
Please enter the desired core power state
And enter the number to select the frequency. For example, if you want to use 938Mhz, write 6 and press ENTER.