Radeon Driver Power Management Has Room For Improvement
Phoronix: Radeon Driver Power Management Has Room For Improvement
Today on Phoronix are not only new benchmarks of the proprietary Catalyst graphics driver compared to the open-source Radeon Linux driver alternative when looking at the OpenGL frame-rates, but also metrics on a number of other fronts. In this article is a graphics driver comparison when looking at the system power consumption, GPU operating temperature, and CPU usage too. The results are quite interesting and not commonly looked at on Phoronix or by users.
DynPM does work, but not well...
I have a HD 5400 card, and with power management set to DynPM, it switches between High profile en Mid profile.
Problems (black screens) occur with refreshes of the screen on lower (low, mid) profiles because of sync problems.
High profile makes the card hot, and makes the fan spin loudly even when your compositing desktop is not doing anything.