# For computer with 2 fans, use a variant of this instead: # Status check timeout (seconds), override with -timeout option # Report status on stdout, override with -verbose option # Automatic fan control, override with -auto option # Run as daemon, override with -daemon option I've pretty much exhausted all of my know-how and I am at my wits end. So, anyway, I'm throwing this out there in case anyone has some thoughts or ideas.

But then why does it work flawlessly under Windows?

I would assume there is some hardware issue, or something is heating up. (i.e with the bottom cover on in a warm room) CPU temps are always well below 40c when the fans are running. However, the 39c temp is never reached under -normal- conditions. Also watching the temps with lm-sensors, it seems like when the fans do shut off, it's when the SODIMM temp gets to 39c. However the fans still run for about an hour once they start. The one thing I did try that finally made the fans stop was disabling the nvidia GPU with bbswitch, taking the bottom off the laptop to increase airflow, and opening a window in the room to lower the ambient temperature. I've also tried Arch Linux, Manjaro, Linux Mint, etc. Thinking since it's a newer skylake CPU, I've tried every Ubuntu mainline kernel (4.4, 4.5, 4.6rc1). However, after a few minutes as the laptop warms up, the fans will kick on and continue to run at the slowest speed. When the laptop is cold, and I boot into Ubuntu the fans are off. Under Ubuntu (or any Linux I've tried), once the fans start, they run pretty much forever.

When they do come on, they shut off quickly and the temps drop. The fans hardly come on, even under a load.

Under Windows 10 the laptop stays nice and cool.

Dell laptop temp and fan control