Public bug reported:
In order to test Kubuntu 14.04.3 LTS desktop hardware support on my
laptop I attempted to install it (via USB stick) onto a USB external
hard drive, with the plan of booting off the external drive and leaving
my internal drive safely alone. I figured I could trust the installer
to be sensible.
What a depressingly fatal mistake that was...
The internal drive is now screwed up, it drops to grub rescue if I
attempt to boot off it. Manually attempting to use grub rescue seems
problematic, because grub rescue doesn't like the licence on the
internal drive's grub files.
The external drive can't be booted either, because grub wasn't properly
installed on it.
This happened when asking it to do a non-manual install over the entire
external drive - including formatting. If I had done a manual install I
would have avoided this mess by explicitly asking it to install GRUB on
the external drive. Or, if the installer had warned me what it was
doing with GRUB, like it does with other file system operations, I might
have been able to avoid this mess.
This is obviously a really nasty bug in the installer. If it's asked to
install with all normal default actions over entire disk /dev/sdX, it
doesn't make sense to do that - except then screw up grub on /dev/sdY.
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: boot corruption device grub installer kubuntu unbootable
** Tags added: kubuntu
** Tags added: installer
** Tags added: boot device grub unbootable
** Tags added: corruption
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https://bugs.launchpad.net/bugs/1507448
Title:
Kubuntu installation into external disk ruins internal disk boot
whilst leaving external disk unbootable
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