Comment 5 for bug 1602888

After installing the v4.7-rc7 mainline build kernel I can confirm that this bug still exists.

I installed the following 3 debs with sudo dpkg -i *.deb:

linux-headers-4.7.0-040700rc7_4.7.0-040700rc7.201607110032_all.deb
linux-headers-4.7.0-040700rc7-generic_4.7.0-040700rc7.201607110032_amd64.deb
linux-image-4.7.0-040700rc7-generic_4.7.0-040700rc7.201607110032_amd64.deb

Next, I rebooted the laptop and confirmed I was running on 4.7 with uname -r:
4.7.0-040700rc7-generic

I used the laptop for a few minutes until the fans came on. The fans continued to run, and are still running 30 minutes later. Here's the output of lm-sensors showing that the cpu is cool, yet the fans are spinning away.

dell_smm-virtual-0
Adapter: Virtual device
Processor Fan: 1935 RPM
Processor Fan: 2134 RPM
CPU: +33.0°C
GPU: +1.0°C
SODIMM: +45.0°C

Other thoughts - I don't know if this is relevant to the fan issue, but in powertop under the "idle stats" tab, the CPU package never gets past C2. This is the case with all kernels I've tried. Perhaps the fan issue is related to the screwy skylake power management? I've attached a text file of the powertop idle stats with the 4.7 kernel.