Installation stuck - mkfs.ext2 waiting on interactive prompt

Bug #1692094 reported by Simon Marchi on 2017-05-19
This bug affects 1 person
Affects Status Importance Assigned to Milestone
ubiquity (Ubuntu)

Bug Description

A colleague of mine was trying to install Ubuntu 16.04, but the installation wizard would get stuck. mkfs.ext2 was stuck reading on stdin. We ran the same command in a shell, and found that it printed something like this:

Found a dos partition table in <partition>
Proceed anyway? (y,n)

and was waiting for the input of the user. He was unlucky enough that the installer would reuse a similar partition layout as the system he installed before in non-UEFI mode. I didn't find a "non-interactive mode" option for mkfs.ext2, but if it exists the installer should use it. Otherwise, maybe pipe the "yes" command in it.

If that matters, he selected "Use entire disk" with full disk encryption enabled.

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