Comment 0 for bug 1457353

Ubuntu version: 14.04.2

When running Software Updater (update-manager) to update the packages, it freezes when trying to update grub-pc package.

I think this is related to the fact that grub-pc detected a modification of a configuration file and needs to ask the user for confirmation on the action to take. However, the package required to display this (libgtk2-perl) is not installed by default.

Steps to reproduce the problem:
1 - install a fresh stock version of Ubuntu 14.04.2 on your device
2 - modify the file /etd/default/grub (for instance, comment the line "GRUB_HIDDEN_TIMEOUT=0" or simply add a comment at the end of the file), then save and run `sudo update-grub2`
3 - Restart the computer and start "Software Updater"
Updates are being downloaded and installed. However when reaching grub-pc configuration, the window turns black and white and it has to be killed. (see attached screenshot update-manager-freeze.png)

In order to fix the problem, before running the Software Updater, you need to install package `libgtk2-perl`. In that case, a new window will be displayed to ask what to do with the modified configuration file.

Note that this problem does not happen when running the update through a terminal (sudo apt-get update && sudo apt-get dist-upgrade) because the grub modification confirmation is then displayed using ncurse.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.7
ProcVersionSignature: Ubuntu 3.16.0-30.40~14.04.1-generic 3.16.7-ckt3
Uname: Linux 3.16.0-30-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.10
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Thu May 21 15:09:54 2015
InstallationDate: Installed on 2015-05-21 (0 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: dist-upgrade
UpgradeStatus: No upgrade log present (probably fresh install)