Comment 63 for bug 356152

I'm willing to try debugging this, but any ideas on what I should look at? Here were some places I started with (based on the earlier posts in this thread).

I'm using 10.04, and when I run update-manager manually, it lists a whole bunch of updates - it just never pops up (nor do I see any tray icon).

$ ls -l /etc/cron.daily/apt
-rwxr-xr-x 1 root root 15690 2010-04-15 01:27 /etc/cron.daily/apt

$ sudo aptitude full-upgrade
[sudo] password for yang:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading extended state information
Initializing package states... Done
The following NEW packages will be installed:
  linux-headers-2.6.32-24{a} linux-headers-2.6.32-24-generic{a}
  linux-image-2.6.32-24-generic
The following packages will be upgraded:
  apt apt-transport-https apt-utils at-spi base-files dpkg empathy
  empathy-common evince gdm gnome-orca gnome-panel gnome-panel-data
  google-chrome-stable grub-common grub-pc gwibber gwibber-service hudson
  hunspell-en-ca ia32-libs icedtea-6-jre-cacao icedtea6-plugin
  libatspi1.0-0 libdbusmenu-glib1 libdbusmenu-gtk1 libevdocument2
  libevview2 libnautilus-extension1 libnotify1 libpanel-applet2-0
  libusb-0.1-4 linux-generic linux-headers-generic linux-image-generic
  linux-libc-dev myspell-en-gb myspell-en-za nautilus nautilus-data
  nautilus-sendto-empathy nginx openjdk-6-jdk openjdk-6-jre
  openjdk-6-jre-headless openjdk-6-jre-lib openoffice.org-thesaurus-en-us
  python-pyatspi python-ubuntuone-client software-center
  ubuntu-system-service ubuntuone-client ubuntuone-client-gnome ureadahead
54 packages upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
Need to get 42.8MB/189MB of archives. After unpacking 216MB will be used.
Do you want to continue? [Y/n/?] n
Abort.

$ ps `pgrep -f update-`
  PID TTY STAT TIME COMMAND
20970 ? S 0:00 update-notifier

$ date
Wed Aug 4 17:41:06 PDT 2010

$ ls -l -h /var/lib/apt/periodic/
total 0
-rw-r--r-- 1 root root 0 2010-08-04 07:47 download-upgradeable-stamp
-rw-r--r-- 1 root root 0 2010-08-04 07:44 update-stamp
-rw-r--r-- 1 root root 0 2010-08-04 07:44 update-success-stamp
-rw-r--r-- 1 root root 0 2010-08-04 07:47 upgrade-stamp