I've been running into issues while running Linux Mint MATE 19 64-bit in my laptop (Toshiba L750). It's installed in a SSD drive and there are 16GB of RAM installed.
I purchased a SSD to move to Linux, (Win7 was installed in my previous mechanical drive), but I'm feeling very disapointed to see the results. If the desktop is opened with no applications running everything seems fine, but when I open a simple editor, Libre Office, firefox, etc. the fan runs at a maximum Speed.
After searching on internet this issue, I see that was suggested to use "sensors" to monitor temperature: in Win 7 the temperature of both Cores (Core i5-2450) is around 39-41 ºC, reaching 45ºC while playing a Youtube video in Firefox (fan remains silent), while in Linux the base temperature is around 49-52 ºC reaching 65ºC while playing a video in Firefox.
I found really strange that there appear only 2 states in the governor: "Performance" and "Powersave", and this last one is the one used, but does not seem to work fine, since it should be very conservative while stepping up the processor frequency, but it is almost instantaneous (sometimes even moving the mouse or minimizing a program cause the processor to run at a maximum speed).
In Windows the base speed seems to be around 780MHz, reaching 1400MHz while the video is being played while in Linux the base speed is around 1200MHz reaching 2400MHz while playing the video.
In case this was caused by Linux Mint, I installed Lubuntu 18.04 with the very same results.
I also read somewhere in stackexchange that this could be caused by the graphics card, so I tried to use both nvidia and xorg drivers, with the very same results, so I'm not sure how to proceed with this.
Is Linux created for Desktop computers only?
Could anyone please point in the right direction?
Note: I'm not providing reference links because I tried dozens of different solutions.