I use the following xorg.conf option to limit my GPU to a low power profile:
Option "RegistryDwords" "PowerMizerEnable=0x1; PerfLevelSrc=0x3333; PowerMizerLevel=0x2; PowerMizerDefault=0x2; PowerMizerDefaultAC=0x2"
However, when enabling modesetting by adding this in the kernel command line:
nvidia-drm.modeset=1
then the driver ignores the power limit configured with RegistryDwords.
Is this intended, a known bug, or is it just me? I need the perf level limit to keep the GPU fan at 0RPM and reduce noise when booting to Linux for work. I don’t need performance as I do not run games when booting to Linux.
Using driver 455.38 on Gentoo Linux 64-bit with a GTX 980 Ti.