One from developer of Debian found source of this bug. Source if BTRFS subvolumes
Please find in google what is BTRFS subvolumes https://www.google.com/search?client=ubuntu-sn&channel=fs&q=btrfs+subvolume Main of Ubuntu based distribution use subvolumes. Only Ubuntu Desktop not use subvolumes. Only Ubuntu Desktop finds os-prober correct. It is very valuable information for developers, how to repair this bug. More information on screenshots on this link https://imgur.com/a/tJ0MDzU Other my tests: I installed more distributions on the same SSD on ext4 on the same PC. All work correct. On every last installed distribution are automatically displayed previous installed distributions in GRUB. On BTRFS no. Source of issue are BTRFS subvolumes. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2098408 Title: os-prober bug. Boot issue if are installed more Ubuntu based distribution on the same SSD To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/os-prober/+bug/2098408/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
