https://bugs.freedesktop.org/show_bug.cgi?id=75127
Alex Deucher agd5f@yahoo.com changed:
What |Removed |Added ---------------------------------------------------------------------------- See Also| |https://bugzilla.kernel.org | |/show_bug.cgi?id=72701
--- Comment #22 from Alex Deucher agd5f@yahoo.com --- It seems runpm is not working properly on your system. Booting with radeon.runpm=0 reverts back to the 3.12 behavior (PX dGPUs are not dynamically powered down). Did manually powering on/off the dGPU via debugfs ever work on your system? See the "Forcing the power state of the devices" section of this page: http://nouveau.freedesktop.org/wiki/Optimus/ for how to test that.