ERROR - Could not update fan speed about nvfancontrol HOT 3 OPEN

Assuming you have enabled Coolbits then it's almost certainly an issue of unprivileged X server. I would suggest you try X11 as root; you can always revert back if you want. If the problem still persists when you run X11 as root then we found a new bug!

from nvfancontrol.

I've the same issue. It used to work, however Nvidia's driver past a certain version seems to not support manual fan control anymore. Hopefully this is a bug, because the fancontrol slider in 'nvidia-settings' still exists, but doesn't work either.

Nvidia Driver version: 470.57.02

the patch notes mention, but I am unsure if this affects us:

• Updated GPU fan control to be available by default in nvidia-settings and NV-CONTROL, for GPU boards that support programmable fan control. Previously, this was only available when bit 2 was set in the "Coolbits" X config option.

https://www.nvidia.com/download/driverResults.aspx/177145/en-us

further info:

https://forums.developer.nvidia.com/t/fan-speed-regression-with-nvidia-beta-470-42-01-and-rtx-3080-fans-dont-stop-on-idle/183604/2

the 'fix' described there works for me. That being said, it doesn't appear to be a 'good' fix.

from nvfancontrol.

As far as I understand you still need X11 running as root to do anything, regardless of Coolbits.

from nvfancontrol.