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I'm stuck at 6.6.62-gentoo-dist (bin). Maybe a btrfs issue

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tedlasso
n00b
n00b

Joined: 27 Oct 2023
Posts: 33

Posted: Wed Feb 12, 2025 8:52 am Post subject: I'm stuck at 6.6.62-gentoo-dist (bin). Maybe a btrfs issue

Hello, I use btrfs with snapper and grub-btrfs (https://github.com/Antynea/grub-btrfs) for my laptop. I needed to roll back last Dec and at some point I noticed that my kernel stays at 6.6.62-gentoo-dist. I do have 6.6.67 and 6.6.74 on my /boot but they won't show up in grub. I've done the grub-mkconfig -o /boot/grub/grub.cfg many times and it finds the kernels but at boot they won't be available. Also in the grub menu I can only find old snapshots from 2024.

Here's the output of grub-mkconfig -o:

Code:

sudo grub-mkconfig -o /boot/grub/grub.cfg
Password:
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-6.6.74-gentoo-dist
Found initrd image: /boot/intel-uc.img /boot/amd-uc.img /boot/initramfs-6.6.74-gentoo-dist.img
Found linux image: /boot/vmlinuz-6.6.74-gentoo-dist.old
Found initrd image: /boot/intel-uc.img /boot/amd-uc.img /boot/initramfs-6.6.74-gentoo-dist.img.old
Found linux image: /boot/vmlinuz-6.6.67-gentoo-dist
Found initrd image: /boot/intel-uc.img /boot/amd-uc.img /boot/initramfs-6.6.67-gentoo-dist.img
Found linux image: /boot/vmlinuz-6.6.62-gentoo-dist
Found initrd image: /boot/intel-uc.img /boot/amd-uc.img /boot/initramfs-6.6.62-gentoo-dist.img
Found linux image: /boot/vmlinuz-6.6.58-gentoo-dist
Found initrd image: /boot/intel-uc.img /boot/amd-uc.img /boot/initramfs-6.6.58-gentoo-dist.img
Found linux image: /boot/vmlinuz-6.6.57-gentoo-dist
Found initrd image: /boot/intel-uc.img /boot/amd-uc.img /boot/initramfs-6.6.57-gentoo-dist.img
Found linux image: /boot/vmlinuz-6.6.57-gentoo-dist.old
Found initrd image: /boot/intel-uc.img /boot/amd-uc.img /boot/initramfs-6.6.57-gentoo-dist.img.old
Found linux image: /boot/vmlinuz-6.6.51-gentoo-dist
Found initrd image: /boot/intel-uc.img /boot/amd-uc.img /boot/initramfs-6.6.51-gentoo-dist.img
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.
Found Gentoo Linux on /dev/nvme0n1p2
Found Gentoo Linux on /dev/nvme0n1p2
Found Debian GNU/Linux 12 (bookworm) on /dev/nvme0n1p3
Adding boot menu entry for UEFI Firmware Settings ...
Detecting snapshots ...
Found snapshot: 2025-02-11 15:41:56 | .snapshots/259/snapshot | post | Upgrading to sys-kernel/gentoo-kernel-bin-6.6.74 replacing version(s) 6.6.74 |
Found snapshot: 2025-02-11 09:30:21 | .snapshots/237/snapshot | single | new |
Found snapshot: 2025-02-10 11:01:19 | .snapshots/236/snapshot/.snapshots/1/snapshot | single | N/A |
Found snapshot: 2024-12-13 11:40:53 | .snapshots/236/snapshot | single | writable copy of #234 |
Found 4 snapshot(s)
Unmount /tmp/grub-btrfs.OUuAh1h6jF .. Success
done

here's some other info:

Code:

lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
nvme0n1 259:0 0 465.8G 0 disk
├─nvme0n1p1 259:1 0 2G 0 part /efi
├─nvme0n1p2 259:2 0 426.7G 0 part /.snapshots
│ /
├─nvme0n1p3 259:3 0 29.3G 0 part
└─nvme0n1p4 259:4 0 7.8G 0 part [SWAP]

Code:

cat /etc/fstab
# <fs>       <mountpoint> <type>    <opts>    <dump> <pass>

#LABEL=boot    /boot    ext4    defaults 1 2
/dev/nvme0n1p1 /efi vfat defaults,noatime 1 2
#LABEL=root
/dev/nvme0n1p2 / btrfs defaults,noatime 0 1
/dev/nvme0n1p2 /.snapshots btrfs subvol=.snapshots 0 0
#LABEL=swap    none    swap    sw    0 0
/dev/nvme0n1p4 none swap sw 0 0

Code:

sudo btrfs subvolume list .
ID 256 gen 59370 top level 5 path Downloads
ID 832 gen 59990 top level 5 path .snapshots
ID 1070 gen 59996 top level 832 path .snapshots/236/snapshot
ID 1071 gen 58154 top level 1070 path .snapshots
ID 1072 gen 58154 top level 1071 path .snapshots/1/snapshot
ID 1073 gen 59133 top level 832 path .snapshots/237/snapshot
ID 1095 gen 59888 top level 832 path .snapshots/259/snapshot

Code:

eselect kernel list
Available kernel symlink targets:
[1] linux-6.6.74-gentoo
[2] linux-6.6.74-gentoo-dist *

uname -r
6.6.62-gentoo-dist

this is a bit odd Boot0000 is EFI/gentoo/grub64.efi but my EFI at root is empty and the /efi partition has /efi/EFI/gentoo/grub.cfg and grubx64.efi)

Code:

sudo efibootmgr
Password:
BootCurrent: 0000
Timeout: 0 seconds
BootOrder: 0000,0003,0001,2001,2002,2003
Boot0000* gentoo HD(1,MBR,0x4bedd25a,0x800,0x1388000)/\EFI\gentoo\grubx64.efi
Boot0001* HDD0: KINGSTON SNV2S500G PciRoot(0x0)/Pci(0x1d,0x4)/Pci(0x0,0x0)/NVMe(0x1,00-26-B7-78-5A-23-9F-A5)/HD(1,MBR,0x4bedd25a,0x800,0x400000)RC
Boot0003* debian HD(1,MBR,0x4bedd25a,0x800,0x400000)/\EFI\debian\shimx64.efi
Boot2001* EFI USB Device RC
Boot2002* EFI DVD/CDROM RC
Boot2003 EFI Network RC

I'll try to symlink the /efi/EFI/gentoo/grubx64.efi to my EFI if you think its ok.. (I'll wait for your input)

My quess is that I'm somehow in my snapshots as my root and it just boots to an old grub config but can't figure out how to change this behavior.

loravis
n00b
n00b

Joined: 29 Dec 2024
Posts: 18
Location: Bremen, Germany

Posted: Wed Feb 12, 2025 9:52 am Post subject:

Quote:

but they won't show up in grub

I assume that they're not showing up in the "Advanced Options" menu in the grub boot menu, is that correct?

tedlasso
n00b
n00b

Joined: 27 Oct 2023
Posts: 33

Posted: Wed Feb 12, 2025 1:32 pm Post subject:

loravis wrote:

Quote:

but they won't show up in grub

I assume that they're not showing up in the "Advanced Options" menu in the grub boot menu, is that correct?

They don't show up. Only the 6.6.62 and older ones are there

loravis
n00b
n00b

Joined: 29 Dec 2024
Posts: 18
Location: Bremen, Germany

Posted: Wed Feb 12, 2025 1:47 pm Post subject:

Code:

sudo cat /boot/grub/grub.cfg | grep Linux

Run this command and show me the output, please.

tedlasso
n00b
n00b

Joined: 27 Oct 2023
Posts: 33

Posted: Wed Feb 12, 2025 3:04 pm Post subject:

loravis wrote:

Code:

sudo cat /boot/grub/grub.cfg | grep Linux

Run this command and show me the output, please.

a bit long but here's the output

Code:

sudo cat /boot/grub/grub.cfg | grep Linux
Password:
menuentry 'Gentoo GNU/Linux' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-209593d9-6236-4766-9d2d-0a864c582ad3' {
echo 'Loading Linux 6.6.74-gentoo-dist ...'
submenu 'Advanced options for Gentoo GNU/Linux' $menuentry_id_option 'gnulinux-advanced-209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.74-gentoo-dist' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.6.74-gentoo-dist-advanced-209593d9-6236-4766-9d2d-0a864c582ad3' {
   echo 'Loading Linux 6.6.74-gentoo-dist ...'
menuentry 'Gentoo GNU/Linux, with Linux 6.6.74-gentoo-dist (recovery mode)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.6.74-gentoo-dist-recovery-209593d9-6236-4766-9d2d-0a864c582ad3' {
   echo 'Loading Linux 6.6.74-gentoo-dist ...'
menuentry 'Gentoo GNU/Linux, with Linux 6.6.74-gentoo-dist.old' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.6.74-gentoo-dist.old-advanced-209593d9-6236-4766-9d2d-0a864c582ad3' {
   echo 'Loading Linux 6.6.74-gentoo-dist.old ...'
menuentry 'Gentoo GNU/Linux, with Linux 6.6.74-gentoo-dist.old (recovery mode)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.6.74-gentoo-dist.old-recovery-209593d9-6236-4766-9d2d-0a864c582ad3' {
   echo 'Loading Linux 6.6.74-gentoo-dist.old ...'
menuentry 'Gentoo GNU/Linux, with Linux 6.6.67-gentoo-dist' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.6.67-gentoo-dist-advanced-209593d9-6236-4766-9d2d-0a864c582ad3' {
   echo 'Loading Linux 6.6.67-gentoo-dist ...'
menuentry 'Gentoo GNU/Linux, with Linux 6.6.67-gentoo-dist (recovery mode)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.6.67-gentoo-dist-recovery-209593d9-6236-4766-9d2d-0a864c582ad3' {
   echo 'Loading Linux 6.6.67-gentoo-dist ...'
menuentry 'Gentoo GNU/Linux, with Linux 6.6.62-gentoo-dist' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.6.62-gentoo-dist-advanced-209593d9-6236-4766-9d2d-0a864c582ad3' {
   echo 'Loading Linux 6.6.62-gentoo-dist ...'
menuentry 'Gentoo GNU/Linux, with Linux 6.6.62-gentoo-dist (recovery mode)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.6.62-gentoo-dist-recovery-209593d9-6236-4766-9d2d-0a864c582ad3' {
   echo 'Loading Linux 6.6.62-gentoo-dist ...'
menuentry 'Gentoo GNU/Linux, with Linux 6.6.58-gentoo-dist' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.6.58-gentoo-dist-advanced-209593d9-6236-4766-9d2d-0a864c582ad3' {
   echo 'Loading Linux 6.6.58-gentoo-dist ...'
menuentry 'Gentoo GNU/Linux, with Linux 6.6.58-gentoo-dist (recovery mode)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.6.58-gentoo-dist-recovery-209593d9-6236-4766-9d2d-0a864c582ad3' {
   echo 'Loading Linux 6.6.58-gentoo-dist ...'
menuentry 'Gentoo GNU/Linux, with Linux 6.6.57-gentoo-dist' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.6.57-gentoo-dist-advanced-209593d9-6236-4766-9d2d-0a864c582ad3' {
   echo 'Loading Linux 6.6.57-gentoo-dist ...'
menuentry 'Gentoo GNU/Linux, with Linux 6.6.57-gentoo-dist (recovery mode)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.6.57-gentoo-dist-recovery-209593d9-6236-4766-9d2d-0a864c582ad3' {
   echo 'Loading Linux 6.6.57-gentoo-dist ...'
menuentry 'Gentoo GNU/Linux, with Linux 6.6.57-gentoo-dist.old' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.6.57-gentoo-dist.old-advanced-209593d9-6236-4766-9d2d-0a864c582ad3' {
   echo 'Loading Linux 6.6.57-gentoo-dist.old ...'
menuentry 'Gentoo GNU/Linux, with Linux 6.6.57-gentoo-dist.old (recovery mode)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.6.57-gentoo-dist.old-recovery-209593d9-6236-4766-9d2d-0a864c582ad3' {
   echo 'Loading Linux 6.6.57-gentoo-dist.old ...'
menuentry 'Gentoo GNU/Linux, with Linux 6.6.51-gentoo-dist' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.6.51-gentoo-dist-advanced-209593d9-6236-4766-9d2d-0a864c582ad3' {
   echo 'Loading Linux 6.6.51-gentoo-dist ...'
menuentry 'Gentoo GNU/Linux, with Linux 6.6.51-gentoo-dist (recovery mode)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.6.51-gentoo-dist-recovery-209593d9-6236-4766-9d2d-0a864c582ad3' {
   echo 'Loading Linux 6.6.51-gentoo-dist ...'
menuentry 'Gentoo Linux (on /dev/nvme0n1p2)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-simple-209593d9-6236-4766-9d2d-0a864c582ad3' {
submenu 'Advanced options for Gentoo Linux (on /dev/nvme0n1p2)' $menuentry_id_option 'osprober-gnulinux-advanced-209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.62-gentoo-dist--209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.62-gentoo-dist (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.62-gentoo-dist--209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.62-gentoo-dist (recovery mode) (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.62-gentoo-dist-root=UUID=209593d9-6236-4766-9d2d-0a864c582ad3 ro single rootflags=subvol=.snapshots-209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.58-gentoo-dist (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.58-gentoo-dist--209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.58-gentoo-dist (recovery mode) (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.58-gentoo-dist-root=UUID=209593d9-6236-4766-9d2d-0a864c582ad3 ro single rootflags=subvol=.snapshots-209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.57-gentoo-dist (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.57-gentoo-dist--209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.57-gentoo-dist (recovery mode) (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.57-gentoo-dist-root=UUID=209593d9-6236-4766-9d2d-0a864c582ad3 ro single rootflags=subvol=.snapshots-209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.57-gentoo-dist.old (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.57-gentoo-dist.old--209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.57-gentoo-dist.old (recovery mode) (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.57-gentoo-dist.old-root=UUID=209593d9-6236-4766-9d2d-0a864c582ad3 ro single rootflags=subvol=.snapshots-209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.51-gentoo-dist (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.51-gentoo-dist--209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.51-gentoo-dist (recovery mode) (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.51-gentoo-dist-root=UUID=209593d9-6236-4766-9d2d-0a864c582ad3 ro single rootflags=subvol=.snapshots-209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo Linux (on /dev/nvme0n1p2)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-simple-209593d9-6236-4766-9d2d-0a864c582ad3' {
submenu 'Advanced options for Gentoo Linux (on /dev/nvme0n1p2)' $menuentry_id_option 'osprober-gnulinux-advanced-209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.62-gentoo-dist--209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.62-gentoo-dist (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.62-gentoo-dist--209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.62-gentoo-dist (recovery mode) (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.62-gentoo-dist-root=UUID=209593d9-6236-4766-9d2d-0a864c582ad3 ro single rootflags=subvol=.snapshots-209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.58-gentoo-dist (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.58-gentoo-dist--209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.58-gentoo-dist (recovery mode) (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.58-gentoo-dist-root=UUID=209593d9-6236-4766-9d2d-0a864c582ad3 ro single rootflags=subvol=.snapshots-209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.57-gentoo-dist (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.57-gentoo-dist--209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.57-gentoo-dist (recovery mode) (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.57-gentoo-dist-root=UUID=209593d9-6236-4766-9d2d-0a864c582ad3 ro single rootflags=subvol=.snapshots-209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.57-gentoo-dist.old (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.57-gentoo-dist.old--209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.57-gentoo-dist.old (recovery mode) (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.57-gentoo-dist.old-root=UUID=209593d9-6236-4766-9d2d-0a864c582ad3 ro single rootflags=subvol=.snapshots-209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.51-gentoo-dist (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.51-gentoo-dist--209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Gentoo GNU/Linux, with Linux 6.6.51-gentoo-dist (recovery mode) (on /dev/nvme0n1p2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.51-gentoo-dist-root=UUID=209593d9-6236-4766-9d2d-0a864c582ad3 ro single rootflags=subvol=.snapshots-209593d9-6236-4766-9d2d-0a864c582ad3' {
menuentry 'Debian GNU/Linux 12 (bookworm) (on /dev/nvme0n1p3)' --class debian --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-simple-c0a7cdf9-75bc-412b-86d0-4eb43538042a' {
submenu 'Advanced options for Debian GNU/Linux 12 (bookworm) (on /dev/nvme0n1p3)' $menuentry_id_option 'osprober-gnulinux-advanced-c0a7cdf9-75bc-412b-86d0-4eb43538042a' {
menuentry 'Debian GNU/Linux (on /dev/nvme0n1p3)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.1.0-31-amd64--c0a7cdf9-75bc-412b-86d0-4eb43538042a' {
menuentry 'Debian GNU/Linux, with Linux 6.1.0-31-amd64 (on /dev/nvme0n1p3)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.1.0-31-amd64--c0a7cdf9-75bc-412b-86d0-4eb43538042a' {
menuentry 'Debian GNU/Linux, with Linux 6.1.0-31-amd64 (recovery mode) (on /dev/nvme0n1p3)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.1.0-31-amd64-root=UUID=c0a7cdf9-75bc-412b-86d0-4eb43538042a ro single-c0a7cdf9-75bc-412b-86d0-4eb43538042a' {
menuentry 'Debian GNU/Linux, with Linux 6.1.0-28-amd64 (on /dev/nvme0n1p3)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.1.0-28-amd64--c0a7cdf9-75bc-412b-86d0-4eb43538042a' {
menuentry 'Debian GNU/Linux, with Linux 6.1.0-28-amd64 (recovery mode) (on /dev/nvme0n1p3)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.1.0-28-amd64-root=UUID=c0a7cdf9-75bc-412b-86d0-4eb43538042a ro single-c0a7cdf9-75bc-412b-86d0-4eb43538042a' {
pete@gentoo ~ $

loravis
n00b
n00b

Joined: 29 Dec 2024
Posts: 18
Location: Bremen, Germany

Posted: Wed Feb 12, 2025 7:04 pm Post subject:

Mmm yea, that's rather strange. According to that output, grub should be configured perfectly... What's likely happening here is that grub is pulling an incorrect or outdated configuration file when booting up, for whatever. How exactly do those snapshots of yours work? How'd you set them up?

tedlasso
n00b
n00b

Joined: 27 Oct 2023
Posts: 33

Posted: Wed Feb 12, 2025 8:14 pm Post subject:

Quote:

How exactly do those snapshots of yours work? How'd you set them up?

I always use Gentoo Wiki. For this Btrfs page + snapper page and then the grub-btrfs (link in my first post) to add the menu entries to grub. My setup automatically takes a pre and post snapshot of every emerged package when I run sudo emerge -uDN @world. I usually clean these snapshots except the last one after a successful reboot.

I think my issue started last Dec when I needed to "go back" after my system didn't boot. I think I'm on the snapshot and it just has the grub.cfg somewhere which won't get updated with sudo grub-mkconfig -o /boot/grub/grub.cfg

If this issue is not solved easily I'll try to change btrfs to ext4 for my SSD.

loravis
n00b
n00b

Joined: 29 Dec 2024
Posts: 18
Location: Bremen, Germany

Posted: Wed Feb 12, 2025 8:41 pm Post subject:

I don't know if this'll work, because I do not use those tools, however this may be worth attempting. Recreate your grub configuration via grub-mkconfig. Once you've done that, manually create a new snapshot using snapper create (please make sure you read the manpage or snapper --help if you've never done this before), then restart your machine and boot into that new snapshot. In theory, assuming that everything works correctly, this should grant the booted system access to the up to date grub configuration and make the newer kernels available.

tedlasso
n00b
n00b

Joined: 27 Oct 2023
Posts: 33

Posted: Wed Feb 12, 2025 9:03 pm Post subject:

loravis wrote:

I don't know if this'll work, because I do not use those tools, however this may be worth attempting.

Recreate your grub configuration via grub-mkconfig. Once you've done that, manually create a new snapshot using snapper create (please make sure you read the manpage or snapper --help if you've never done this before), then restart your machine and boot into that new snapshot.

In theory, assuming that everything works correctly, this should grant the booted system access to the up to date grub configuration and make the newer kernels available.

That's what I've tried few times already. I always see the old grub menu with the same kernels and snapshots. They don't change no matter what Ive tried. I even tried to use the Debian's grub (it's on Sam SSD) but it also finds these same entries even if I update it's grub with os-prober enabled. No new kernel/ snapshot shown.

loravis
n00b
n00b

Joined: 29 Dec 2024
Posts: 18
Location: Bremen, Germany

Posted: Wed Feb 12, 2025 9:22 pm Post subject:

Just to clarify, when you boot your system, do you select a snapshot from the snapshots menu or do you just boot into the root snapshot (which is the snapshot that grub-btrfs should boot into by default if nothing is selected)?

tedlasso
n00b
n00b

Joined: 27 Oct 2023
Posts: 33

Posted: Thu Feb 13, 2025 6:08 am Post subject:

loravis wrote:

Just to clarify, when you boot your system, do you select a snapshot from the snapshots menu or do you just boot into the root snapshot (which is the snapshot that grub-btrfs should boot into by default if nothing is selected)?

I boot normally to Gentoo. The issue is that there in no new kernels available. 6.6.62 is the newest in grub menu. All the snapshots shown in grub menu are from last year (EDIT: and they are not bootable any more). After boot I can see the new snapshots and kernels on my filesystem. The grub that does booting is somehow not updating even after grub-mkconfig -o/boot/grub/grub.cfg (where it finds all newer kernels and snapshots).

EDIT:
I uploaded the grub menu, Gentoo grub options menu and Gentoo snapshots menu here:
https://imgdrop.io/image/grub-menu.NIWJv
https://imgdrop.io/image/advanced-options-gentoo.NIXHD
https://imgdrop.io/image/snapshots.NI6Dh

EDIT2:
I tried to run dracut again and updated grub:

Code:

sudo dracut --force --hostonly --kver 6.6.74-gentoo-dist

sudo grub-mkconfig -o /boot/grub/grub.cfg

and no help. I also manually edited the grub menu entry (changed 6.6.62 to 6.6.74) and laptop not booting because kernel is not loaded. Here's the edited menu entry pic:[/code]
https://dl.imgdrop.io/file/aed8b140-8472-4813-922b-7ce35ef93c9e/2025/02/13/IMG_20250213_103953_HDR7c6da6b0afd2e14d.jpeg

tedlasso
n00b
n00b

Joined: 27 Oct 2023
Posts: 33

Posted: Thu Feb 13, 2025 11:46 am Post subject:

It seems I've found the issue. My grub.cfg has weird entries. Here's some:

Code:

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Gentoo GNU/Linux' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-209593d9-6236-4766-9d2d-0a864c582ad3' {
load_video
if [ "x$grub_platform" = xefi ]; then
set gfxpayload=keep
fi
insmod gzio
insmod part_msdos
insmod btrfs
search --no-floppy --fs-uuid --set=root 209593d9-6236-4766-9d2d-0a864c582ad3
echo 'Loading Linux 6.6.74-gentoo-dist ...'
linux /.snapshots/236/snapshot/boot/vmlinuz-6.6.74-gentoo-dist root=UUID=209593d9-6236-4766-9d2d-0a864c582ad3 ro rootflags=subvol=.snapshots/236/snapshot
echo 'Loading initial ramdisk ...'
initrd /.snapshots/236/snapshot/boot/intel-uc.img /.snapshots/236/snapshot/boot/amd-uc.img /.snapshots/236/snapshot/boot/initramfs-6.6.74-gentoo-dist.img
}

What the if grub platform = xefi means? It's something I've never seen. Anyways it then would use my snapshots/236/snapshot/boot folder. Weird!

Theres entries for 6.6.62 and older kernels also on that /etc/grub.d/10_Linux

Here's the next issue:

Code:

### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###

### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/25_bli ###
if [ "$grub_platform" = "efi" ]; then
insmod bli
fi
### END /etc/grub.d/25_bli ###

### BEGIN /etc/grub.d/30_os-prober ###
menuentry 'Gentoo Linux (on /dev/nvme0n1p2)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-simple-209593d9-6236-4766-9d2d-0a864c582ad3' {
insmod part_msdos
insmod btrfs
search --no-floppy --fs-uuid --set=root 209593d9-6236-4766-9d2d-0a864c582ad3
linux /boot/vmlinuz-6.6.62-gentoo-dist root=UUID=209593d9-6236-4766-9d2d-0a864c582ad3 ro rootflags=subvol=.snapshots
initrd /boot/intel-uc.img /.snapshots/boot/amd-uc.img /.snapshots/boot/initramfs-6.6.62-gentoo-dist.img
}

entry 30_os-prober would boot from /boot but no 6.6.74 (all the earlier vesions are there) and it would use .snapshots/boot fro amd-uc (intel laptop with intergrated gpu) and initramfs is also from .snapshots. Weird!

then theres the Debian part which is fine. Next one uefi firmware (which don't work at the moment. If I choose it from grub I only have black screen with cursor _)

Code:

### BEGIN /etc/grub.d/30_uefi-firmware ###
if [ "$grub_platform" = "efi" ]; then
menuentry 'UEFI Firmware Settings' $menuentry_id_option 'uefi-firmware' {
fwsetup
}
fi
### END /etc/grub.d/30_uefi-firmware ###

Here's the one I could edit:

Code:

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

and this one shows the old 2023 snapshots. I need to check the grub-btrfs.cfg file next:

Code:

### BEGIN /etc/grub.d/41_custom ###
if [ -f ${config_directory}/custom.cfg ]; then
source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg
fi
### END /etc/grub.d/41_custom ###

### BEGIN /etc/grub.d/41_snapshots-btrfs ###
if [ ! -e "${prefix}/grub-btrfs.cfg" ]; then
echo ""
else
submenu 'Gentoo snapshots' {
configfile "${prefix}/grub-btrfs.cfg"
}
fi
### END /etc/grub.d/41_snapshots-btrfs ###

At least I have something to try now!

grknight
Retired Dev

Joined: 20 Feb 2015
Posts: 2017

Posted: Thu Feb 13, 2025 1:31 pm Post subject:

tedlasso wrote:

What the if grub platform = xefi means? It's something I've never seen.

This is a red herring. [ "x$foo" = "xvalue"] is an old hack that works around an issue in some shells (or test program) when $foo is empty or special values it could not compare correctly. See also https://stackoverflow.com/questions/174119/why-do-shell-script-comparisons-often-use-xvar-xyes

tedlasso
n00b
n00b

Joined: 27 Oct 2023
Posts: 33

Posted: Thu Feb 13, 2025 5:13 pm Post subject:

grknight wrote:

tedlasso wrote:

What the if grub platform = xefi means? It's something I've never seen.

Ok, thanks! I think I'll rsync my SSD and switch back to ext4. BTRFS is just too weird for me.

zen_desu
Tux's lil' helper

Joined: 25 Oct 2024
Posts: 137

Posted: Thu Feb 13, 2025 5:18 pm Post subject:

tedlasso wrote:

grknight wrote:

tedlasso wrote:

What the if grub platform = xefi means? It's something I've never seen.

Ok, thanks! I think I'll rsync my SSD and switch back to ext4. BTRFS is just too weird for me.

I'm not sure if it would help to simply use a FAT32 partition for booting? Is this a GRUB issue or specifically a filesystem issue?
_________________
µgRD dev
Wiki writer

tedlasso
n00b
n00b

Joined: 27 Oct 2023
Posts: 33

Posted: Fri Feb 14, 2025 5:26 am Post subject:

zen_desu wrote:

I'm not sure if it would help to simply use a FAT32 partition for booting? Is this a GRUB issue or specifically a filesystem issue?

I think I'm not ready for btrfs. I go back to ext4. This is my second try with btrfs and both times I had issues with it. I'm sure it's my fault!

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