I have been able to boot latest kernel by modifying (with E key) the boot entry:
replaced:
set root='lvmid/sMjw7e-rWxK-OkJd-RNtY-4599-Hz1q-3DtcNn/nbU01K-S2Qi-z01i-W3xO-s27B-UrZD-Fs8YLE'
by
set root=/dev/mapper/main-myroot
So now:
paul@albukerk:/boot/grub$ cat /proc/version
Linux version 6.11.10-amd64 (
debian-kernel@lists.debian.org) (x86_64-linux-gnu-gcc-14 (Debian 14.2.0-8) 14.2.0, GNU ld (GNU Binutils for Debian) 2.43.1) #1 SMP PREEMPT_DYNAMIC Debian 6.11.10-1 (2024-11-23)
paul@albukerk:/boot/grub$
I am not much familiar with lvmid...
paul@albukerk:/boot/grub$ ls -l /dev/disk/by-uuid
total 0
lrwxrwxrwx 1 root root 10 18 déc 14:20 5d8325c5-27b7-4c42-8c73-ac2dc5936b4b -> ../../dm-0
lrwxrwxrwx 1 root root 10 18 déc 14:20 8A31-4125 -> ../../sda2
lrwxrwxrwx 1 root root 10 18 déc 14:20 a9d23244-eea3-4239-b6d4-43b6e9339321 -> ../../dm-1
paul@albukerk:/boot/grub$
lvm> vgs -v
VG Attr Ext #PV #LV #SN VSize VFree VG UUID VProfile
main wz--n- 4,00m 3 2 0 437,01g 0 sMjw7e-rWxK-OkJd-RNtY-4599-Hz1q-3DtcNn
lvm>
Guess I would need to replace that string... still not knowing exactly where.