Comment #2 of http://ubuntuforums.org/showthread.php?t=1969614 says that
renaming the grub.cfg on the _hidden partition_ allows update-grub to
work, but this did not help in my situation.
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I, too, have "lost" my other Ubuntu partition. I installed 12.04 on
sda1 using Btrfs; it booted fine. Then I installed another 12.04 on
sda2 (/boot) and sda3 (swap) and sda4 (/), and it boots fine, but now I
can't boot from sda1. Mounting and then unmounting sda1 as suggested in
comment #2 does
With the os-prober version from maverick (1.39) installed on oneiric, it
looks like this:
U 58/0/2 root@loadrunner:pts/0 03:18:30 [~] # os-prober /dev/sda5
/dev/sda5:Debian GNU/Linux (wheezy/sid):Debian:linux
U 59/0/2 root@loadrunner:pts/0 03:18:38 [~] # linux-boot-prober /dev/sda5
/dev/sda5:/dev/
Hi Colin,
yes, this bug happens for me, too, with the os-prober versions from
natty (1.44ubuntu1) and oneiric (1.49ubuntu1), but not from maverick
(1.39). Except that the other OS is a Debian Sid and not another Ubuntu.
But I don't think this makes a difference here.
Mounting the root as well as
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: os-prober (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/674841
Title:
o
Can you try mounting the filesystem in question, unmounting it straight
away, and then running os-prober? If this works around the problem (I'm
not suggesting it as a permanent solution), then this is the same as bug
683355.
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os-prober 1.40 doesn't detect another ubuntu installation anymore
https://bugs.launchpad.net/bugs/674841
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