*** This bug is a duplicate of bug 683355 ***
https://bugs.launchpad.net/bugs/683355
Yes, this does appear to be the result of bug 733240. Rebooting got the
filesystems clean again and os-prober found the OS in the extended partition.
I'll mark this as a duplicate.
The reason for the unclean unmounting was from the rescue CD, however, after
changing the root filesystem multiple times. This is a separate issue. I did
originall also install grub from withing both OSes, not just from the rescue
mode alone. So the filesystems were left uncleanly mounted, somehow.
** This bug has been marked a duplicate of bug 683355
os-prober fails to find OSes on uncleanly-unmounted filesystems
* You can subscribe to bug 683355 by following this link:
https://bugs.launchpad.net/ubuntu/+source/os-prober/+bug/683355/+subscribe
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https://bugs.launchpad.net/bugs/745800
Title:
grub-install loses OS in extended partition
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