lost upgrades

[Colin Law]

On 18 June 2012 21:19, Udvarias Ur <udvarias1 at gmail.com> wrote:
> Earlier today 'Upgrade Manager' informed me that there were 15 packages to
> upgrade.
>
>     Security upgrades: involving several apt related packages. and
>     Purposed upgrades: involving several kernel related packages.
>
> I've been postponing upgrading to 12.04 until after I've successfully
> installed the nVidia driver I downloaded.
>
> After I accepted the installation of these 15 packages, I got (I now know)
> the mistaken impression that 12.04 was being installed. I used 'Top' to kill
> 'Upgrade Manager.' Now neither 'Upgrade Manager' nor 'Aptitude Package
> Manager' will even find let alone install these upgrades.
>
> How can I remedy this problem?

In a terminal try
sudo apt-get update  &&   sudo apt-get dist-upgrade

Colin