Comment 3 for bug 249220

If possible would you please check if the attached script (03anacron) resolves the issue? It should be put as an executable in /usr/lib/pm-utils/sleep.d/ Please do not hesitate to ask if putting the script in the right place and/or making it executable is not straightforward for you.

From your description I'm not sure whether you already forced your system to perform the update itself. If so, it might take a while before new updates are available so you can check that the script is working. By enabling 'pre-released updates' temporarily in software sources, you can convince the system that there are updates waiting.

After that, please see if the update notification appears next time you resume from suspend. Note that it takes 5 minutes for anacron to start after resume if the default /etc/anacrontab is being used. After that the daily apt job can take up to 30 minutes to start. This means it can take up to 35 minutes before you are being notified.

Be sure not to perform the update itself, if you do not want the pre-released packages on your system. Disable it again in the software sources and run 'sudo apt-get update' in a terminal to get back to your initial configuration.

Thanks.