Comment # 32
on bug 104064
from Alex Deucher
(In reply to taijian from comment #29) > 2) The inconsistend dpm behaviour between dc=1 and dc=0 is still a thing. > force_atpx=1 plus dc=1 gives me wonderful dpm with the dGPU fully powering > down between uses. force_atpx=1 plus dc=0 does not. No idea what's up with > that. The platform claims to have an eDP panel connected, apparently even in hybrid graphics mode when it's not actually in use. The non-DC code assumes that if there is an eDP panel, it's always connected since it's a non-removable display and it shouldn't be present if there isn't one. Because the driver thinks a display is connected, the dGPU is kept on.
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