[Bug 108781] 4.19 Regression - Hawaii (R9 390) boot failure - Invalid PCC GPIO / invalid powerlevel state / Fatal error during GPU init

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108781

--- Comment #29 from pascalp <freedesktop at clouddrop.de> ---
For me it is the other way round:
With my 290x I used to boot fine under 4.18 without amdgpu.dpm set at all.
After updating to 4.19 and being unable to boot I read that amdgpu.dpm defaults
to "enabled" so I explicitly had to add amdgpu.dpm=0 to be able to boot again.
amdgpu.dc does not matter in this context - both 0 and 1 work as long as dpm is
disabled. This is on an unpatched kernel (4.19.4 currently).

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