Comment 18 for bug 504343

Update:
Upgraded to Lucid and the issue is kind of solved for me.
Update-manager GUI doesn't pop up, but it appears in 'window chooser' applet of buttom panel.
When I do a 'sudo apt-get update' it pops up.
Also I can see available updates in conky.
Fantastic, I'm happy, thanks very much for your efforts regarding Lucid.

For the record:
Resume from hibernation (2 days uptime)
$ ls -l /var/lib/apt/periodic
total 0
-rw-r--r-- 1 root root 0 2010-05-26 19:28 update-stamp
-rw-r--r-- 1 root root 0 2010-05-26 19:28 update-success-stamp

$ ps ax|grep update-notifier
 9483 ? S 0:01 update-notifier
21884 pts/0 S+ 0:00 grep --color=auto update-notifier

$ perl auto.pl
8 normal updates, 4 security updates available
interval_days from gconf: 0
Autolaunch disabled because interval_days 0 <= 0

$ gconftool --recursive-list /apps/update-notifier
 auto_launch = true
 hide_reboot_notification = false
 show_apport_crashes = true
 end_system_uids = 500
 regular_auto_launch_interval = 0

$ dpkg -l linux-image* | grep ii
ii linux-image-2.6.31-21-generic 2.6.31-21.59
ii linux-image-2.6.32-22-generic 2.6.32-22.33
ii linux-image-generic 2.6.32.22.23

$ dpkg -l update-manager
ii update-manager 1:0.134.8

$ dpkg -l update-notifier
ii update-notifier 0.99.3