[Bug 101528] RX460 Memory clock stays high until card is "used"

https://bugs.freedesktop.org/show_bug.cgi?id=101528

--- Comment #1 from Alexander Tsoy alexander@tsoy.me --- Same problem with TONGA. When GPU is idle, mclk goes to its maximum. This is easily reproducible: just turn off the monitor. I noticed this issue after upgrade from 4.9.x kernels to 4.11.7. Maybe I'll check the mainline kernel later and/or bisect.

# cat /sys/class/drm/card0/device/pp_dpm_mclk 0: 150Mhz 1: 300Mhz 2: 700Mhz 3: 1450Mhz * # sensors amdgpu-* amdgpu-pci-0100 Adapter: PCI adapter fan1: 2025 RPM temp1: +47.0°C (crit = +0.0°C, hyst = +0.0°C)