[Bug 201539] AMDGPU R9 390 automatic fan speed control in Linux 4.19/4.20/5.0

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=201539

--- Comment #75 from michael (lkbugs at deegan.id.au) ---
An update. Now on 5.10.0-2-amd64.

Fresh boot, with amdgpu.dc=1, everything is mostly fine. pwm1_enable=2. Except
that after resuming from suspend, pwm1_enable=1 and pwm1=255, resulting in
maxxed out fans. Subsequently setting pwm1_enable=2 results in old buggy
behaviour (2000RPM until 96C). However, if I suspend and resume again, it
sometimes goes back to behaving!

amdgpu.dc=0 is a bit of a non-starter, as while fan speeds remain low, so does
performance.

In all cases temp1_crit and temp1_crit_hyst still have crazy values (104000000
and -273).

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