Well we bought the laptop with Ubuntu on it, and the regular support guy couldn't help, so i had to schedule a call with the "advanced linux support" team that doesnt work weekends.
The laptop keeps going to the lock screen and then sleeping, randomly and very frequently; i though the windows key was bugged and was seind the Win + L lock randomly. But then it persisted during a live boot of Clonezilla, which doesn't support Win+ L, so now I think it's a hardware issue with the power button, but it doesn't randomly turn off in the BIOS or in GRUB, so it's probably some obscure linux issue, …