I have some identical machines, same hardware and all running Debian 9.1 with the nvidia-driver (375.66) from the repository.
- They all run a GTX 970 card
- Same xorg.conf
- Same X11 folder (tested with rsync -ac)
On some of them, the GPU fan is spinning at low speed continuously, it’s exactly what I want.
On the others, the fan is OFF and is spinning fast a few seconds every 20 seconds which is a bit annoying.
When I stops the graphical manager on those machines, the fan starts to spin normally and do the yoyo again when I reload lightdm, even on the logon screen.
I tried to activate coolbits = 4 in xorg, I can then change the fan speed from nvidia-settings but when I set a low level, it keeps doing the yoyo with more or less time between each peak.
So, if you have any idea of what’s wrong :-)
Thanks in advance !