Comment 23 for bug 356152

Hmm. /etc/cron.daily/apt will sleep for up to 1800 seconds (30 minutes),
so it looks like there's a one-day lag built into the system.
On the first day, /etc/cron.daily/apt updates the list of packages;
on the next day, update-manager uses the updated list.

Maybe we could get rid of that wasted day by having the automatically started
update-manager check /var/lib/apt/periodic/update-success-stamp;
if it's old, it should wait up to half an hour for it to change
before starting.