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
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https://bugs.launchpad.net/bugs/1751554
Title:
os-prober: generates buggy btrfs entries in grub.cfg
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