Public bug reported:
Currently due to
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1289977 my system
is not bootable. The work around instructions are to dpkg-reconfigure
grub-pc. However that does not work. Here are the steps I take.
1) Download netboot.iso
2) dd netboot.iso onto usb drive
3) reboot nonbootable laptop on usb drive
4) Choose recovery menu option
5) Choose launch shell with root mounted on /target
6) cd /target/@
7) mount --bind /dev dev
8) mount --bind /proc proc
9) mount --bind /sys sys
10) chroot .
11) bash
12) dpkg-reconfigure grub-pc
Results: /usr/sbin/grub-probe: error: cannot find a device for / (is /dev
mounted?)
Expected: Grub to be installed on /dev/sdb and /dev/sdc
System information:
/dev/sdb,/dev/sdc (/dev/sda is the usb recovery device right now) are both
members of a raid 1 using mdadm /dev/md127
/dev/md127 is a full lvm the volume group is called ds or /dev/ds, ubuntu
didn't support swap on btrfs at the time
The lvm is split into two logical volumes one for swap, and one for root
The root lvm /dev/ds/root has the entire section given to a btrfs filesystem
The btrfs filesystem has four "labels" @,
@apt-snapshot....release-upgrade-raring, @...release-upgrade-saucy,
@...release-upgrade-trusty, @home
lsb release output:
Distributor ID: Ubuntu
Description: Ubuntu 14.04.1 LTS
Release: 14.04
Codename: trusty
Can I provide any additional information?
I am going to try to reboot into a 14.04 ubuntu desktop and add bug
reporting information into this.
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1357750
Title:
Grub fails to install on software raid 1 + lvm + btrfs
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