Thanks for taking the time to report this issue. However, I don't think that it really is a bug, so I'm going to set it as Invalid. If you think this decision is wrong please set the status again to "New", with a comment indicating the reason; and anyway feel free to submit further problems you may find.
Apt isn't the only package manager, there may be also a aptitude, synaptic, adept, dpkg, or another package-related process running. Alternativelly, there may be an existing lock-file from a package manager that died in an unexpected way and left it there; if this is the case you can solve the problem by manually deleting it (if you run apt- get, it will tell you where the file is located, I don't remember the exact name right now). ** Changed in: update-notifier (Ubuntu) Status: New => Invalid -- "A package manager is working" but apt is not running https://bugs.launchpad.net/bugs/134959 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs