I have the same issue running aptitude from the command line. It has recently (within two weeks) started to hang on every "aptitude full- upgrade". See the (partial) ps listing below
root 6724 0.0 0.0 4156 1772 pts/0 S 09:17 0:00 bash root 6770 0.5 0.9 33764 19480 pts/0 Sl+ 09:19 0:04 aptitude full-upgrade root 7589 3.2 0.0 0 0 ? Zs 09:25 0:10 [dpkg] <defunct> -- update-manager freezes due to defunct dpkg process https://bugs.launchpad.net/bugs/134858 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