In my case changing permissions helped: sudo chmod 755 /var/cache/apt /var/cache/apt/archives /var/cache/apt/archives/partial
(Originally they were all 700 with owner as root.) -- Update Manager, "install" button does nothing when u-m was opened by itself https://bugs.launchpad.net/bugs/414181 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
