https://bugs.freedesktop.org/show_bug.cgi?id=108379
Bug ID: 108379 Summary: high idle power consumption Product: DRI Version: unspecified Hardware: Other OS: All Status: NEW Severity: normal Priority: medium Component: DRM/AMDgpu Assignee: dri-devel@lists.freedesktop.org Reporter: grmat@sub.red
system: - Polaris10 (Ellesmere) - Linux 4.18.14 - WQHD (2560*1440 pixels) monitor with 144 Hz (DisplayPort)
expected behaviour: GPU power states should be lowered to the minimum states while idling to save power, heat and noise.
actual behaviour: - DC on (default): GPU stuck at highest SCLK DPM state, power consumption as per amdgpu_pm_info is ~24 Watts
- amdgpu.dc=0: MCLK stuck at high DPM state, power consumption as per amdgpu_pm_info is ~26 Watts
- Windows: correct (lowest) SCLK/MCLK DPM states, measured power consumption is ~16 Watts lower compared to Linux
Note: https://bugzilla.kernel.org/show_bug.cgi?id=201275 fixed a regression causing *additional* power draw (SCLK and MCLK both at max, power consumption at ~38 Watts while idling).
I can't tell if it's a regression as I've just recently got the GPU. Randomly tested kernels from within 4.17 to 4.18.14 all suffer from this issue.