Recently, when running the update manager, and after checking package info. shows this message.
Could not calculate the upgrade
An unresolvable problem occurred while calculating the upgrade.
Please report this bug against the 'update-manager' package and include the following error message:'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'
Best Answer
Download the updates and see what happens.
sudo apt-get upgrade