The problem Fedora Kinoite (immutable, based on OSTree) didn't boot after an upgrade. I had to pick the previous OS from Grub to boot again. Instead of booting it would show the Grub menu, and after selecting an entry in Grub I would get a black screen. Then my keyboard would turn off. The only thing I could do was pressing the power button briefly to turn off the computer (no need to hold down the button, which is unusual). The solution I enabled SVM Mode in the BIOS and it could boot. I'm p...