On Wed, Jul 24, 2013 at 05:13:42PM +1000, Dave Airlie wrote: > After a full device powerdown via the optimus power switch, we seem > to lose the HDMI device completely on power on, this keep track of > whether we had a hdmi audio sub function device at power on, and > pokes a magic register to make it reappear after the optimus power > switch is thrown. > > This at least works on my NVC4 machine, probably needs testing on > a few other laptops with other nvidia GPUs. >
Sorry for a stupid question, but how do you test "optimus power switch" ? (I have a laptop with hybrid Optimus graphics, so I could test..) Thanks, -- Pasi
