https://bugzilla.kernel.org/show_bug.cgi?id=65761
--- Comment #6 from Christoph Haag haagch.christoph@googlemail.com --- Created attachment 117761 --> https://bugzilla.kernel.org/attachment.cgi?id=117761&action=edit dmesg with drm-fixes-3.12-radeon-poweroff branch
Hm, I think it kind of works with drm-fixes-3.12-radeon-poweroff.
There seems to be no error in dmesg and X works fine.
I have monitored /sys/kernel/debug/vgaswitcheroo/switch a while.
Unfortunately most of the time it says 0:IGD:+:Pwr:0000:00:02.0 1:DIS: :DynPwr:0000:01:00.0
I have seen it say 0:IGD:+:Pwr:0000:00:02.0 1:DIS: :DynOff:0000:01:00.0 But I don't know really know how I got it to switch and whether it was something I did at all.
Then, unprovoked, it switched to on ("DynPwr") again. (There's nothing running on the radeon GPU, only X with xcompmgr on intel and radeon is configured as provideroffloadsink)
I don't know how to coax it to power the gpu off. But at least it CAN work already.
Maybe this is useful, maybe not: With the radeon in idle I have this: $ cat /sys/kernel/debug/dri/1/radeon_pm_info uvd vclk: 0 dclk: 0 power level 0 sclk: 30000 mclk: 15000 vddc: 825 vddci: 850 pcie gen: 3
with glxgears I have this: $ cat /sys/kernel/debug/dri/1/radeon_pm_info uvd vclk: 0 dclk: 0 power level 2 sclk: 85000 mclk: 120000 vddc: 1050 vddci: 975 pcie gen: 3