https://bugzilla.kernel.org/show_bug.cgi?id=74551 --- Comment #15 from Alex Deucher <alexdeucher@xxxxxxxxx> --- (In reply to maxis11 from comment #13) > (In reply to Alex Deucher from comment #12) > > (In reply to maxis11 from comment #6) > > > BTW runpm works with 3.12.7 and 3.12.8 (with 3.13 and later runpm=1 freezes > > > laptop during boot) > > > > runpm support didn't exist until 3.13. If "echo OFF > > > /sys/kernel/debug/vgaswitcheroo/switch" has never worked, then your system > > has never had functional support for turning on/off the dGPU. > > kernel 3.12.7: > When loading SUMO2(6480g) That's not runpm, that's dpm (dynamic power management). Runpm turns the dGPU off completely when it's not in use. Dpm dynamically adjusts the clocks and voltages of the GPU when it's powered on. Prior to 3.13, runpm was not available and the dGPU was always powered on unless you manually powered it off via debugfs. -- You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
