https://bugs.freedesktop.org/show_bug.cgi?id=104064

--- Comment #22 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to taijian from comment #21)
> Now testing the same build, but with amdgpu.dc=0 amdgpu.force_atpx=1.
> 
> Here the system does  not crash on repeated invocations of the dGPU (via
> DRI_PRIME=1 glxinfo), but it also does not fully power down, as confirmed by
> powertop (26-28 W power consumption, vs ~12W with dc=1 and the dGPU not in
> use).
> 
> So the option to force atpx apparently does nothing without dc. Is that
> intended? (Sorry, I don't speak C, so I really cannot tell...)

Please attach your dmesg output.  DC or not-DC shouldn't affect the runtime pm.

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