amdgpu on RX 560: memory and core clocks not lowered on idle

Submitted by Mike

Assigned to Default DRI bug account

Description

Created attachment 139206
amdgpu_pm_info with 4.15 kernel

There is a problem with amdgpu power management.
With kernels 4.15.X MCLK is always stays at max value.
With kernels 4.16.X MCLK/SCLK both stays at max.

At idle desktop GPU draws about 4W more, according to /sys/kernel/debug/dri/0/amdgpu_pm_info

Kernels from Ubuntu PPA
http://kernel.ubuntu.com/~kernel-ppa/mainline/

DRM/Mesa libs from Oibaf PPA
https://launchpad.net/~oibaf/+archive/ubuntu/graphics-drivers

Attachment 139206, "amdgpu_pm_info with 4.15 kernel":
amdgpu_pm_info.4.15.txt