https://bugzilla.kernel.org/show_bug.cgi?id=214071
Bug ID: 214071 Summary: amdgpu idle power draw to high at +75Hz Product: Drivers Version: 2.5 Kernel Version: 5.13.10 Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: pb.g@gmx.de Regression: No
For best viewing pleasure I usually set my monitor to 144Hz and native 1080p.
At that refresh rate my RX6900XT draws about 35 Watts in idle situations Memory clock stays at 1000Hz.
I have to lower the monitors refresh rate to 75Hz, then the card draws only 8 Watts in idle and memory clock goes significantly down to 96MHz.
Using 100 or 120 Hz does not help.
Situation in windows is different. The same hardware setup works in Windows10 at 1080p@144 with idle power draw of just 8 Watts.
So my guess is this is a driver issue and not a hardware issue.