Always, this laptop was initially installed with i think Mint 15 and had been upgraded several times

Will try those htop settings, kinda had forgotten it even had any settings 😅

It’s happening with whatever is the heaviest process at the moment and has happened for months, MANY reboots since then. Usually the heaviest process is the browser, but not always

Nope, that’s what i suspected but no, half of the 32Gb of RAM and zero or very little swap are in use when it happens, very good part of why i’m stumped

Ah shit, forgot to mention that, will add it to the post. Yes, it’s SSD.