My Dell starts heating up on the marked spot (see photo below) immediately after booting any Linux distro I tried (Ubuntu 16.04, Ubuntu 14.04, Mint 18.2, Arch). This spot is cool on Windows. Also, the other site (bottom) is cold. I don't know what device is below neither why it happens. I checked with
sensors (lm-sensors) and all is below 45°C, but obviously the part here has no sensor.
There is no HDD in this laptop. Also, this spot is hot when runnig USB live.
I contacted Dell support and was informed that it is palm rest assemby that heats up. Any idea on how to fix it?