Created attachment 137825 [details]
dmesg with 4.17-wip-7f462340284582c0180384c046ddd6dda03888b1 and dc=0

Here the promised output with dc=0.

Interesting thing happening here: On system startup, the dGPU stays powered off
until explicitly invoked. After that, the system does not crash and the gpu
dump from before seems to be gone. However, the dGPU also refuses to fully
power down again and can be seen as continuing to consume power via powertop.
So dc=0 vs dc=1 continues to have an impact wrt pm.