Hello! Thank you for taking the time to report this issue and helping to make Ubuntu better!
This problem doesn't directly belong to update-manager, but it seems to be a more general dpkg issue. I've found a comment in bug #323894 posted by Michael Vogt who wrote that such a kind of problems can be solved downloading a new version of dpkg from this archive: https://edge.launchpad.net/~mvo/+archive . Could you please confirm that this workaround solves your issue? Thanks in advance ** Changed in: update-manager (Ubuntu) Status: New => Incomplete -- _cache->open() failed, please report. https://bugs.launchpad.net/bugs/320222 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs