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Differences between aptitude and update-manager on Ubuntu 14.04

Asked by ubuntu-tester

Hello everybody,

On Ubuntu 14.04, aptitude (and apt-get) indicates avalaible upgrades while update-manager indicates no available upgrades :

$ aptitude safe-upgrade -s
The following packages will be upgraded:
  compiz compiz-core compiz-gnome compiz-plugins-default libcgmanager0 libcgmanager0:i386 libclutter-gtk-1.0-0 libcompizconfig0 libdecoration0
9 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 1463 kB of archives. After unpacking 0 B will be used.

$ update-manager
=> "The software on this computer is up to date" in a pop-up

Aptitude (and apt-get) works fine, this "problem" is related to update-manager. I have just configured update-manager to display immediatly when there are security and other updates but it doesn't seem to solve the "problem".
I notice this behaviour several times on my computer at home (with standard configuration) and on my computers at work (with specific configuration).

Do you know if there is an explanation or if it's a bug ?

Thanks :)

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Revision history for this message
actionparsnip (andrew-woodhead666) said : 		#1

I suggest you report a bug

Revision history for this message
ubuntu-tester (ubuntu-tester1) said : 		#2

On my pc at work, configured to display "other updates" weekly :
- on 2015-01-15 update-manager suggests to upgrade libclutter-gtk-1.0-0
- on 2015-01-16 update-manager suggests to upgrade libcgmanager0

On 2015-01-14, this packages were not suggested by update-manager but were suggested by aptitude .
Unfortunately, I had to upgrade my PC at home with aptitude, so I can't check it.

Maybe, there is a kind of "timestamp" because update-manager is configured to display "other updates" weekly, even if I run update-manager manually.

Revision history for this message
ubuntu-tester (ubuntu-tester1) said : 		#3

Yesterday, after upgrading packages via update-manager :

- On my PC at work :

$ aptitude safe-upgrade -s
The following packages will be upgraded:
  compiz compiz-core compiz-gnome compiz-plugins-default libcompizconfig0 libdecoration0 python-cupshelpers
  system-config-printer-common system-config-printer-gnome system-config-printer-udev
The following packages are RECOMMENDED but will NOT be installed:
  avahi-utils
10 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 1 610 kB of archives. After unpacking 2 048 B will be used.
Do you want to continue? [Y/n/?]
Would download/install/remove packages.

$ update-manager
=> "The software on this computer is up to date" in a pop-up

- On another PC at work :

$ aptitude safe-upgrade -s
The following packages will be upgraded:
  libnautilus-extension1a nautilus nautilus-data
3 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 584 kB of archives. After unpacking 0 B will be used.
Do you want to continue? [Y/n/?]
Would download/install/remove packages

$ update-manager
=> "The software on this computer is up to date" in a pop-up

I report a bug.

Revision history for this message
ubuntu-tester (ubuntu-tester1) said : 		#4

This is not a bug :

“StableReleaseUpdates will no longer appear in update-manager at the same time for all machines. Instead a subset of machines will be selected at random to receive the update first. The update will only be made available to everyone if there are no serious regressions encountered by the first set of users. There is still a testing process completed by Ubuntu developers before any users receive the update.”

https://wiki.ubuntu.com/PhasedUpdates
http://people.canonical.com/~ubuntu-archive/phased-updates.html