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

[bugzilla-daemon at bugzilla.kernel.org]

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

Tony Chaveiro (tchavei at gmail.com) changed:

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--- Comment #5 from Tony Chaveiro (tchavei at gmail.com) ---
I experience the same issue

4.18-20 kernel on Manjaro (amdgpu + opencl taken from amdgpu pro on 3 x R9
390). Everything works fine. Fan rpm increase with load (tested with stak-xmr
miner).

4.19-8-2 kernel: Rpm fans always on minimum setting. Once one of the gpus hits
95C, sudden bursts of 100% rpm occur (under 1s duration). Application has to be
suspended or hardware damage will occur

checked pwm1_enable which displays "1". Changing to "2" has no effect.
pwmconfig drives fans to 100% during config but is unable to provide control.

pwm1 reads different values (from 86 to 127) but fans don't appear to change
speed at all.

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