On Mon, Jul 30, 2018 at 10:39:35AM +0200, Pedro Pinho wrote: > All the following commands act like reboot: > sudo poweroff > sudo shutdown -p now > sudo halt -v > The machine closes down all running applications and apears to shutdown, > but immediately starts booting again, exactly like reboot. Actually, I see > no difference if I issue > sudo reboot
OK. After it shuts down everything, there should be a few kernel messages (in green) on the text console. The last one is typically something like: acpi: entering S5 or similar. Do you see those? Any errors printed there in the last seconds before it reboots? This may be a problem with you BIOS/Firmware and it is worth to check if there is an update available. Martin