I've installed ubuntu 16.04 and since first login fan is running constantly. I've tried several desktop envirnment and several version of nvidia graphic card but the same problem. I've check system monitor and cpu usage is normal. Additionally I've tried installing kernel 4.6 but fan is still running and also installing laptop-mode-tools and tlp had no benefit.
In my ubuntu 14.04 everything was good and acpi -t result was around 42-50 c but in ubuntu 16.04 acpi -t is 52-63 c and fan is still running !