[Bug 1054903] Re: update-manager says "Not enough free disk space" but there is enough space

[Jarno Suni]

Oh, I have only seen it complaining there is not enough space at /boot.
This bug is old. Does it happen on any later release than on 12.04?

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Title:
  update-manager says "Not enough free disk space" but there is enough
  space

Status in update-manager package in Ubuntu:
  Confirmed

Bug description:
  Unity notification "Update Manager" icon -> Show updates -> Install
  Updates:

      Not enough free disk space
      The upgrade needs a total of 65,7 M free space on disk '/var/cache'. Please free at least an additional 65,7 M of disk space on '/var/cache'. Empty your trash and remove temporary packages of former installations using 'sudo apt-get clean'.

  There is 715 M available on /var/cache :

  $ df -hT 
  Filesystem     Type      Size  Used Avail Use% Mounted on
  /dev/sda3      ext4       90G   80G  5,4G  94% /
  udev           devtmpfs  3,9G  4,0K  3,9G   1% /dev
  tmpfs          tmpfs     789M  8,0K  789M   1% /tmp
  tmpfs          tmpfs     1,6G  848K  1,6G   1% /run
  none           tmpfs     5,0M     0  5,0M   0% /run/lock
  none           tmpfs     3,9G   76K  3,9G   1% /run/shm
  tmpfs          tmpfs     789M     0  789M   0% /var/tmp
  tmpfs          tmpfs     789M  656K  788M   1% /var/log
  tmpfs          tmpfs     789M     0  789M   0% /var/log/apt
  tmpfs          tmpfs     789M   74M  715M  10% /var/cache

  $ sudo du -hsc /var/cache
  74M     /var/cache
  74M     total

  $ sudo apt-get dist-upgrade
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Calculating upgrade... Done
  The following packages will be upgraded:
    dbus dbus-x11 gstreamer0.10-plugins-bad gvfs gvfs-backends gvfs-bin gvfs-common gvfs-daemons gvfs-fuse gvfs-libs isc-dhcp-client isc-dhcp-common kde-zeroconf kdenetwork kget kopete krdc krfb libdbus-1-3 libdbus-1-3:i386
    libgstreamer-plugins-bad0.10-0 libkopete4 openjdk-7-jre openjdk-7-jre-headless openjdk-7-jre-lib php5 php5-cgi php5-cli php5-common php5-curl php5-gd tzdata tzdata-java
  33 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
  Need to get 65,7 MB of archives.
  After this operation, 416 kB disk space will be freed.
  Do you want to continue [Y/n]? n
  Abort.

  However this works:
  Unity notification "Update Manager" icon -> Install updates

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