Public bug reported:
If Ubuntu Saucy is installed onto a btrfs root device, which is
configured to be a RAID1 mirror (or probably other configurations) then
the grub.cfg is generated with invalid entries.
This is because /etc/grub.d/10_linux gets *both* device names from
btrfs, with a newline between them, and then just sticks that everywhere
in the config file where it was expecting just one device. The newline
in the middle prematurely truncates lines and then starts new invalid
ones.
To reproduce, create your btrfs device something like this during install:
mkfs.btrfs -d raid1 -m raid1 /dev/sda1 /dev/sdb1
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: grub-common 2.00-19ubuntu1 [modified: usr/sbin/grub-mkconfig
usr/share/grub/grub-mkconfig_lib]
ProcVersionSignature: Ubuntu 3.11.0-11.17-generic 3.11.3
Uname: Linux 3.11.0-11-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.12.5-0ubuntu1
Architecture: amd64
Date: Fri Oct 11 12:21:17 2013
InstallationDate: Installed on 2013-10-09 (1 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Beta amd64 (20130925.1)
MarkForUpload: True
SourcePackage: grub2
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.grub.d.10.linux: [modified]
mtime.conffile..etc.grub.d.10.linux: 2013-10-11T12:18:01.364605
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug saucy
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https://bugs.launchpad.net/bugs/1238347
Title:
Invalid grub.cfg generated if root on RAID1 btrfs
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