It appears as though either grub was installed to a disk which is no
longer attached to the system, or something went wrong when bringing up
/boot.
Could you try to see if the following commands give you any results?
mount /boot
ls -l /boot
I'm reducing this bug importance to High; there isn't sufficient data to
be able to consider this a Critical bug, especially since there are
apparently no duplicates (I looked quickly and didn't see bugs that had
the exact same symptoms), and it seems like the messages on upgrade
would have been fairly clear to indicate a major issue during the
upgrade. Additionally, what may have caused this seems fairly
straightforward, so we'll wait until we hear more from you and bring the
importance back up if necessary.
Thanks!
** Changed in: grub2 (Ubuntu)
Importance: Critical => High
** Changed in: grub2 (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1183392
Title:
package grub-pc 2.00-14ubuntu1 failed to install/upgrade:
ErrorMessage: subprocess installed post-installation script returned
error exit status 1
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