On 14/02/2025 at 21:18, Holger Wansing wrote:
Matej Marko <ekon...@atlas.sk> wrote (Fri, 14 Feb 2025 20:43:56 +0100):
Hello,
  I have actually on SSD SATA installed these distributions: Linux Mint, Ubuntu 
Desktop, Kubuntu, Lubuntu, KDE neon, Fyde OS. All actuall version.
  Screenshots are from KDE neon.
  Command sudo update-grub not work correct for me. It finds only Ubuntu 
Desktop, no other distributions.
All screenshots are here
  https://imgur.com/a/crvLj26 <https://imgur.com/a/crvLj26>

Can you describe the root/boot layout of each of these systems ?
The "Disks" screenshot shows that /dev/sda2 to /dev/sda6 have btrfs filesystems. I suspect that os-prober does not work well if the root filesystem is on a btrfs subvolume. See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=983107 for example.

Was Debian installed on this system? (not clear from the above list)
If yes, which version exactly? (Debian 12 Bookworm, Debian testing, unstable 
...)
If not, why is this relevant for this Debian mailinglist?

Isn't the Debian installer team the upstream for os-prober ?

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