Noisy FAN (cpu or graphic card) on laptop even in cold room

Hi,

i have on my laptop Kubuntu since v14.04 and upgrade it to v16.04.
Under ubuntu 14.04 and later 15.10 i had the standard saving energy tool for laptops and my computer was very quite and sometimes fan run high do to workload (which was normal).
Since i upgrade it to 16.04, my CPU or Graphic fan runs at 100% (it seems at least based on the noise level) even if i do nothing and that laptop is on login screen.

my CPU range is about 68C to 83-84C degrees max.

For an unknown reason FAN runs at max and i dislike it especially when i do not require anything from it.

Some people told me that room where i was was hot or that it is normal in summer.... the problem is that even in a room at 20C degrees in cold weather (around 17C degrees outside) laptop has the same behavior.

Therefore problem must be somewhere else. FANs are ok but maybe a setting is corrupted somewhere and i was wondering where.

Any help would be appreciated.
Thx

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Noisy FAN (cpu or graphic card) on laptop even in cold room