On 16/09/2025 at 22:14, Debian wrote:
A new update-grub is called in Debian 13 and the syslog output is attached. Hopefully this will help.
It looks like /dev/sdb2 has the wrong /boot/grub/grub.cfg which has menu entries for /dev/sdb1 ('Debian GNU/Linux 11 SSD', 'Linux 5.10.0-35-amd64'). This is why linux-boot-prober cannot match the menu entries in this file with the 6.1.0-39 kernel image in the partition. It also looks like /vmlinuz and /initrg.img are real files instead of the usual symlinks pointing to the files in /boot.
Try to boot into bookworm on /dev/sdb2, run update-grub, then reboot on trixie and run update-grub.
