On Thu 17 Sep 2026 at 13:40:18 (+0200), Coin wrote: > > After updating my debian 13 last week-end, when I restart my computer, > it launches GRUB as usual, but immediately reboots after GRUB had just > the time to display a first line, but not even the menuentries. > Therefore, I was not able to log in into my debian because it reboots > at infinity.
By "After updating my debian 13", is it possible you mean "after dist-upgrading my debian 12 to 13"? It's just that this looks very like the August thread that started with: ‖ I recently updated my Debian desktop to Trixie. It went fine but Grub ‖ broke. It got as far as "Welcome to GRUB" then black screen and reboot. The thread starts at: https://lists.debian.org/debian-user/2026/08/msg00015.html > I found this: > ### BEGIN /etc/grub.d/30_uefi-firmware ### > if [ "$grub_platform" = "efi" ]; then > fwsetup --is-supported > if [ "$?" = 0 ]; then > menuentry 'UEFI Firmware Settings' $menuentry_id_option 'uefi-firmware' { > fwsetup > } > fi > fi > ### END /etc/grub.d/30_uefi-firmware ### > > to be the cause of the problem, and since from my point of view these > lines seem to be correct, [ … ] I have those lines on my trixie systems, but one is BIOS-booting and so, I assume, fails the if test; the others were installed from scratch. I have two bookworms yet to upgrade, but only one is UEFI, and I'm hoping that making sure I update-grub and grub-install when I upgrade will avoid any such problem. Cheers, David.
