I know this is a common problem and have read other topics but couldn't resolve. Anyways yesterday I found a solution - I have 2 graphic cards (hybrid) and they were both on. So I turned one off and installed Jupiter for power management and from there on the fans were quiet and I was happy as hell.

However (:)), yesterday evening I also updated the system and the fan and it's noise came back. I checked whether I am using only 1 graphics card and I am.

c0dehunter@mintBox ~ $ sudo lshw -c video

[sudo] password for c0dehunter: 

  *-display               

       description: VGA compatible controller

       product: RS780M/RS780MN [Mobility Radeon HD 3200 Graphics]

       vendor: Hynix Semiconductor (Hyundai Electronics)

       physical id: 5

       bus info: pci@0000:01:05.0

       version: 00

       width: 32 bits

       clock: 33MHz

       capabilities: pm msi vga_controller bus_master cap_list rom

       configuration: driver=radeon latency=0

       resources: irq:18 memory:c0000000-cfffffff ioport:c000(size=256) memory:fbcf0000-fbcfffff memory:fbb00000-fbbfffff

Maybe the problem is (false) temp reading from GPU?

c0dehunter@mintBox ~ $ sensors

acpitz-virtual-0

Adapter: Virtual device

temp1:        +44.0°C  (crit = +105.0°C)



k10temp-pci-00c3

Adapter: PCI adapter

temp1:        +47.0°C  (high = +70.0°C)

                       (crit = +115.0°C, hyst = +110.0°C)



radeon-pci-0200

Adapter: PCI adapter

temp1:       +127.5°C  

The thing that is weird is that if I boot into Windows the fan is still at full power (previously it wasn't). Did I f--- up my hardware with software? :)

//OH, yes - I forgot to mention that my laptop is not hot at all. The temps are about 50°C.