I recently updated from Linux Mint 16 to Linux Mint 17 on my Dell Inspiron 5420 with NVIDIA graphics card. After upgrading, the laptop is overheating seriously with temperature going above 90.
Previously, I had bumblebee installed on Linux Mint 16 and the temperature was fine. I have installed Bumblebee but the problem is not solved. Here are the fixes I have tried and it hasn't helped me:
I have also installed i8kutils and checked the fans. Here's the output:
>> i8kctl fan -1 2
It seems the left fan is not working. I tried to change the fan speed but it remains constant:
>> i8kctl fan 1 1 -1 2
Edit: I have found that my fan is not running. Can this be an issue with driver rather than the hardware?