I carried my laptop around in a backpack today. Now it no longer boots. At first it switched off when I was about to provide my login password. I started it again and it switched off sooner, as soon as I had typed the disk decryption password. Now it switches off as it is about to show me the disk decryption password. Like… no power? Batteries super low? But it’s connected to the power and “charging” according to the light. It is also not based on a timer: when I hit ESC to get into the boot menu, I can look at stuff. Running memtest now, for example. So… perhaps the power key is stuck but the boot menu ignores it? I’m confused.
I can plug in a USB stick with a Debian installer on it, and move around in the menus. As soon as I boot the system and the disk is accessed (?) the laptop shuts down. What the hell.