Hi,

I have several installs of Ubuntu Openbox Remix (Bento, a custom version which works very well besides that).

I would guess that this issue does not affect only Lubuntu or Bento, but also other versions. I had a talk with a guy on IRC a few days ago, he is running Ubuntu Gnome 14.04 and he had not been warned since some time, and had 130 packages available for update.

One of the installs I have, (a x86_64 version, on a netbook Samsung N210, which is not often used) has not been yet updated since 12.04.1, so I thought I would test how it goes with update-notifier and update-manager. 

I just started the distribution, and **a while after**, update-notifier **appeared**. It's not instant, it does take some time!

So I looked at the packages which will be updated, and update-notifier, update-manager, and update-manager-common do appear in the list of packages to be updated.

The versions before updating are as follow:
**************************************
[root@bento64:/etc/apt]# apt-cache policy update-notifier
update-notifier:
  Installé : 0.119ubuntu8.6
  Candidat : 0.119ubuntu8.6
 Table de version :
 *** 0.119ubuntu8.6 0
        500 http://fr.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     0.119ubuntu8.1 0
        500 http://fr.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages


[root@bento64:/etc/apt]# apt-cache policy update-manager
update-manager:
  Installé : 1:0.156.14.12
  Candidat : 1:0.156.14.13
 Table de version :
     1:0.156.14.13 0
        500 http://fr.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
 *** 1:0.156.14.12 0
        100 /var/lib/dpkg/status
     1:0.156.14.5 0
        500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages
     1:0.156.14 0
        500 http://fr.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages


[root@bento64:/etc/apt]# apt-cache policy update-manager-core
update-manager-core:
  Installé : 1:0.156.14.12
  Candidat : 1:0.156.14.13
 Table de version :
     1:0.156.14.13 0
        500 http://fr.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
 *** 1:0.156.14.12 0
        100 /var/lib/dpkg/status
     1:0.156.14.5 0
        500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages
     1:0.156.14 0
        500 http://fr.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
[root@bento64:/etc/apt]# 


**************************************

Here is the sources.list used: http://paste.ubuntu.com/7759622/

and here is what will be updated in a moment:
*****************************************

[root@bento64:/etc/apt]# LANG=C apt-get dist-upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
  apt apt-transport-https apt-utils bsdutils ca-certificates dpkg file firefox firefox-locale-en firefox-locale-fr gir1.2-gdkpixbuf-2.0 gir1.2-gtk-2.0 gir1.2-gtk-3.0 gnupg
  gnupg-agent gnupg2 gpgv grub-common grub-pc grub-pc-bin grub2-common gtk2-engines-pixbuf icedtea-6-jre-cacao icedtea-6-jre-jamvm ifupdown initramfs-tools initramfs-tools-bin
  iproute libapt-inst1.4 libapt-pkg4.12 libavcodec53 libavformat53 libavutil51 libblkid1 libbluetooth3 libcups2 libcupsimage2 libcurl3 libcurl3-gnutls libdrm-intel1 libdrm-nouveau1a
  libdrm-radeon1 libdrm2 libgail-3-0 libgail18 libgdk-pixbuf2.0-0 libgdk-pixbuf2.0-common libgnutls26 libgtk-3-0 libgtk-3-bin libgtk-3-common libgtk2.0-0 libgtk2.0-bin
  libgtk2.0-common libgudev-1.0-0 libjson0 libmagic1 libmount1 libnm-glib-vpn1 libnm-glib4 libnm-util2 libnspr4 libnspr4-0d libnss3 libnss3-1d libpostproc52 libsmbclient libssl1.0.0
  libswscale2 libtiff4 libudev0 libuuid1 libwbclient0 libxfont1 libxml2 linux-firmware linux-libc-dev mount network-manager openjdk-6-jre openjdk-6-jre-headless openjdk-6-jre-lib
  openssh-client openssh-server openssl python-libxml2 ssh synaptic tzdata tzdata-java udev update-manager update-manager-core util-linux uuid-runtime
95 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 142 MB of archives.
After this operation, 20.8 MB of additional disk space will be used.
Do you want to continue [Y/n]? 

*****************************************

I must confess that I personally don't mind much that update-notifier works like a "flying shoe" theses days but I care about end users who don't like learning about system administration and want to use their computer as they start an oven or a phone call, so for their use and for the sake of their favorite Ubuntu box, update-notifier is a very important part of their system. I can tell you, because I have installed Ubuntu to several people's machines and I have asked them each time if they wanted the update-notifier warn them when an update is available, and they have all sayd YES! This is good for me!

I will not perform the update in the Samsung N210, and will be back here in the coming days with news about how update-notifier behaves (I'll be adding some sources to the list of repos, to get opportunities of updates faster).

In the meanwhile, it would be very nice if the devs would have a look at the changes which were done between the 12.04.1 version where it works, and the actual version. 

I can provide more files from the logs or else later, if I am told what to provide.

Regards,
Mélodie