https://bugzilla.kernel.org/show_bug.cgi?id=69301
--- Comment #13 from Alex Deucher alexdeucher@gmail.com --- (In reply to Jakob Kummerow from comment #12)
Bisection result:
commit 56684ec5b050e6a392cb3e5324eda12a13413a57 Author: Alex Deucher alexander.deucher@amd.com Date: Wed Oct 30 10:18:37 2013 -0400
drm/radeon: enable DPM by default on BTC asics Seems to be stable on them.Which makes sense in so far as I have a Barts card, but obviously this commit did not introduce the actual problem. I guess I'll have to bisect again with an explicit radeon.dpm=1 kernel parameter.
FWIW, on 3.12 and earlier, I used to "echo low > /sys/class/drm/card0/device/power_profile" by means of an init script, and never had any issues with that.
Jakub, you are seeing bug 68571 since you have a BTC card. Jan is seeing an issue with an SI card.