This happened to me as well, in an upgrade which was affected by bug 182130. I see nothing in the log which indicates that update-manager had any problem upgrading, and I suspect this is a false positive caused by the other failure.
-- package update-manager 1:0.87.1 failed to install/upgrade: ErrorMessage: SystemError in cache.commit(): E:Sub-process /usr/bin/dpkg returned an error code (1) https://bugs.launchpad.net/bugs/182264 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