I also just got this issue. I ran apt-get check and autoremove and some of the other apt-get options. Finally on the GUI update manager it gave the same error and after clicking Install it popped up with the send error report and the following message in a differnt window:
"Package dependencies cannot be resolved This error could be caused by required additional software packages which are missing or not installable. Furthermore there could be a conflict between software packages which are not allowed to be installed at the same time. The following packages have unmet dependencies: libnspr4: " Using synaptic I could not mark the above dependency for reinstallation, but I could for upgrade. After trying that it stated that I had to fix broken packages first. I marked it for removal, but it then wanted to remove a ton of other stuff, but overall it is used by Mozilla. Upon running: sudo apt-get --reinstall install libnspr4 The following error was shown: The following packages have unmet dependencies: libnspr4 : Breaks: evolution-plugins (< 3.2.0-0ubuntu2) but 2.32.2-0ubuntu7 is to be installed E: Unable to correct problems, you have held broken packages. As typical, the Ubuntu Software Center does not show I have Evolution installed (as I do not use it), but was able to remove left over files from when it was installed from a previous distro. Synaptic to the rescue again. The big red icon is now gone and no error occurs. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1036473 Title: I have a red circle with a white bar through it on my top tool bar stating 'Error marking the upgrade' and 'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1036473/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs