Comment 0 for bug 1460396

Description: Ubuntu 14.04.2 LTS
Release: 14.04

update-manager:
  Installed: 1:0.196.13
  Candidate: 1:0.196.13
  Version table:
 *** 1:0.196.13 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1:0.196.11 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages

After running Trusty for about a year, I had easily 3GB worth of old kernels sitting in my /boot folder.

For users that don't know about pruning old kernel versions, much less what kernels are, this is a problem since update-manager refuses to continue the update process when /boot doesn't have enough space.

My friend who I had installed Ubuntu for was complaining about updates not working, so I took a look and this is what was happening. His /boot partition is too small to have so many ~200mb kernel images.

We need a user-friendly way to inform the user that this is happening, and then suggest an automated course of action (apt-get remove oldest kernel + ensure at least one previous verified working kernel (such as purge_old_kernels in https://launchpad.net/ubuntu/+source/bikeshed)), and if it fails, a link to detailed instructions on how to remove old kernels manually.

Attachment is updated ~/update-manager-0.196.13/UpdateManager/Core/utils.py that includes function ensure_enough_room_for_kernel() that only informs the user if there isn't enough space for a kernel upgrade.
It has not been implemented in _main_, I figure the main package devs would want to do that themselves, be it to use for removing the oldest kernel version, or having the user pick from a list of installed kernels which to remove.

Thanks.
    -Tyler Dinsmoor <email address hidden>