My goal is to get the optimal power management one gets on Windows. Meaning:
- the GPU fans should not spin at low temperature (the hardware supports 0 RPM mode)
- optimize power draw (on Windows it draws around 10W on idle, whereas on Ubuntu it draws 30W minimum)
➜ ~ echo "low" | sudo tee /sys/class/drm/card0/device/power_dpm_state low tee: /sys/class/drm/card0/device/power_dpm_state: Invalid argument
What is causing that error? How can I successfully change the value?
Do you think I am on the right path to achieve my goal, or is this approach wrong?
➜ ~ uname -a Linux hostname 5.3.0-46-generic #38~18.04.1-Ubuntu SMP Tue Mar 31 04:17:56 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux ➜ ~ sudo lshw -c video *-display description: VGA compatible controller product: Ellesmere [Radeon RX 470/480/570/570X/580/580X] vendor: Advanced Micro Devices, Inc. [AMD/ATI] physical id: 0 bus info: pci@0000:26:00.0 version: e7 width: 64 bits clock: 33MHz capabilities: pm pciexpress msi vga_controller bus_master cap_list rom configuration: driver=amdgpu latency=0 resources: irq:74 memory:e0000000-efffffff memory:f0000000-f01fffff ioport:e000(size=256) memory:fce00000-fce3ffff memory:c0000-dffff