Comment 0 for bug 1646222

I have a /boot partition which is sized just right to accommodate 3 kernels, plus a little bit of overhead.

$ df -h /boot/
Filesystem Size Used Avail Use% Mounted on
/dev/sda5 280M 144M 118M 56% /boot
$

Previously, update-manager had no problem letting me upgrade kernels. With the latest kernel update in 16.10, I got an error message that I needed more free space on this filesystem.

After bypassing update-manager with 'sudo apt dist-upgrade', the filesystem's usage looks like this:

$ df -h /boot/
Filesystem Size Used Avail Use% Mounted on
/dev/sda5 280M 206M 56M 79% /boot
$

So update-manager is getting the disk usage requirement for /boot off by a factor of 2 (at least? I didn't save the error message from the dialog).

It's better to refuse to upgrade than to fail mid-upgrade due to disk space, but not if that means getting stuck forever with an old kernel unnecessarily.

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: update-manager 1:16.10.7
ProcVersionSignature: Ubuntu 4.8.0-27.29-generic 4.8.1
Uname: Linux 4.8.0-27-generic x86_64
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Nov 30 12:10:25 2016
GsettingsChanges:
 b'com.ubuntu.update-manager' b'show-details' b'true'
 b'com.ubuntu.update-manager' b'window-height' b'551'
 b'com.ubuntu.update-manager' b'first-run' b'false'
 b'com.ubuntu.update-manager' b'window-width' b'813'
 b'com.ubuntu.update-manager' b'launch-time' b'1480522730'
InstallationDate: Installed on 2010-09-24 (2259 days ago)
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
PackageArchitecture: all
SourcePackage: update-manager
UpgradeStatus: Upgraded to yakkety on 2016-10-28 (32 days ago)