Public bug reported: 17.10 & 16.04: Choosing a grub menu entry that references a parallell installed ubuntu system on a btrfs FS does not work.
I've installed neonuser (xenial based distro) in parallel to Kubuntu artful. It's mounted via UUID=879cfb57-f580-4326-a2fe-8dc83e0013f4 /os-neon-user btrfs defaults,subvol=@ 0 2 UUID=879cfb57-f580-4326-a2fe-8dc83e0013f4 /os-neon-user/home btrfs defaults,subvol=@home 0 2 Running update-grub on artful generates grub.cf entries like for the Neon User system: .. linux /boot/vmlinuz-4.13.0-32-generic root=/dev/sda3 initrd /boot/initrd.img-4.13.0-32-generic .. with does not work. Workaround: Edit the entry to linux /@/boot/vmlinuz-4.13.0-32-generic root=/dev/sda3 rootflags=subvol=@ initrd /@/boot/initrd.img-4.13.0-32-generic Boots the other ubuntu OS on the btrfs filesys. I can reproduce the bug on two systems (desktop with xenial, laptop with artful) The grub.cfg entry of the currently booted OS on a btrfs FS is okay. So update-grub handles / on btrfs okay. But os-prober on /whatever with btrfs does not. Achim ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: os-prober 1.74ubuntu1 ProcVersionSignature: Ubuntu 4.13.0-36.40-generic 4.13.13 Uname: Linux 4.13.0-36-generic x86_64 NonfreeKernelModules: openafs wl ApportVersion: 2.20.7-0ubuntu3.7 Architecture: amd64 CurrentDesktop: KDE Date: Sun Feb 25 10:55:13 2018 EcryptfsInUse: Yes InstallationDate: Installed on 2018-01-13 (42 days ago) InstallationMedia: Kubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105.2) SourcePackage: os-prober UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: os-prober (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug artful ** Attachment added: "grub.cfg with buggy os-proper entry for NeonUser on btrfs" https://bugs.launchpad.net/bugs/1751554/+attachment/5062352/+files/grub.cfg ** Summary changed: - os-prober: generated buggy btrfs entries in grub.cfg + os-prober: generates buggy btrfs entries in grub.cfg -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1751554 Title: os-prober: generates buggy btrfs entries in grub.cfg To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/os-prober/+bug/1751554/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs