Hi all. I hope someone can help me.
Problem I do not have a “Start bootloader from a read-only snapshot” menu item on my Grub menu
Context I have a triple boot system on an AMD CPU, first installed about 2 years ago. As well as my main TW, I have Windows and another (fallback) TW install on separate partitions of an NVME SSD. I am using UEFI Secure Boot. I have installed open Nvidia drivers (G06) from the TW repositories.
The Grub boot menu looks like this:
As far as I know, I have never had a Grub menu option to roll back to a previous snapshot. Fortunately, I’ve never needed it which is maybe why I only noticed this recently, but I would like to fix it if possible in case I need the feature at a later date.
Setup
/etc/default/grub includes the line SUSE_BTRFS_SNAPSHOT_BOOTING="true"
/etc/fstab includes
UUID=<...> / btrfs defaults 0 0
UUID=<...> /var btrfs subvol=/@/var 0 0
UUID=<...> /usr/local btrfs subvol=/@/usr/local 0 0
UUID=<...> /srv btrfs subvol=/@/srv 0 0
UUID=<...> /root btrfs subvol=/@/root 0 0
UUID=<...> /opt btrfs subvol=/@/opt 0 0
UUID=<...> /home btrfs subvol=/@/home 0 0
UUID=<...> /boot/grub2/x86_64-efi btrfs subvol=/@/boot/grub2/x86_64-efi 0 0
UUID=<...> /boot/grub2/i386-pc btrfs subvol=/@/boot/grub2/i386-pc 0 0
UUID=<...> /boot/efi vfat utf8 0 2
UUID=<...> swap swap defaults 0 0
UUID=<...> /.snapshots btrfs subvol=/@/.snapshots 0 0
Running ls -l /etc/grub.d gives
total 108
-rwxr-xr-x. 1 root root 12096 Mar 17 06:40 00_header
-rwxr-xr-x. 1 root root 1097 Feb 22 19:49 00_tuned
-rwxr-xr-x. 1 root root 1425 Mar 17 06:40 05_crypttab
-rwxr-xr-x. 1 root root 15476 Mar 17 06:40 10_linux
-rwxr-xr-x. 1 root root 20312 Mar 17 06:40 20_linux_xen
-rw-r--r--. 1 root root 786 Mar 17 06:40 25_bli
-rwxr-xr-x. 1 root root 12878 Mar 17 06:40 30_os-prober
-rwxr-xr-x. 1 root root 1452 Mar 17 06:40 30_uefi-firmware
-rwxr-xr-x. 1 root root 744 Feb 26 13:35 35_fwupd
-rwxr-xr-x. 1 root root 214 Mar 17 06:40 40_custom
-rwxr-xr-x. 1 root root 215 Mar 17 06:40 41_custom
-rwxr-xr-x. 1 root root 937 Mar 17 06:40 80_suse_btrfs_snapshot
-rwxr-xr-x. 1 root root 1259 Mar 17 06:40 90_persistent
-rwxr-xr-x. 1 root root 270 Mar 17 06:40 95_textmode
-rw-r--r--. 1 root root 483 Mar 17 06:40 README
Running ls -l /.snapshots gives
drwxr-xr-x. 1 root root 32 Jan 29 2024 1
drwxr-xr-x. 1 root root 66 Mar 23 17:18 626
drwxr-xr-x. 1 root root 104 Mar 23 17:18 627
...
drwxr-xr-x. 1 root root 104 Apr 1 13:35 635
-rw-r-----. 1 root root 1304 Apr 1 13:53 grub-snapshot.cfg
Running /sbin/btrfs filesystem show gives
Label: none uuid: <...>
Total devices 1 FS bytes used 63.87GiB
devid 1 size 120.00GiB used 83.07GiB path /dev/nvme0n1p7
Running grub2-mkconfig -o /boot/grub2/grub.cfg gives
Generating grub configuration file ...
Found theme: /boot/grub2/themes/openSUSE/theme.txt
Found linux image: /boot/vmlinuz-6.19.10-1-default
Found initrd image: /boot/initrd-6.19.10-1-default
Found linux image: /boot/vmlinuz-6.19.9-1-default
Found initrd image: /boot/initrd-6.19.9-1-default
Warning: os-prober will be executed to detect other bootable partitions.
Its output will be used to detect bootable binaries on them and create new boot entries.
7541.734816 | DM multipath kernel driver not loaded
Found Windows Boot Manager on /dev/nvme0n1p1@/EFI/Microsoft/Boot/bootmgfw.efi
Found openSUSE Tumbleweed on /dev/nvme0n1p8
Adding boot menu entry for UEFI Firmware Settings ...
done
I would be really grateful for any pointers to help fix this problem (or reasons if it cannot be fixed).
