It seems this happens when composite is on and the option 'Display shadows under popup windows'is turned on, leave that option unchecked and it works as it should, one user in above mentioned thread also noticed replacing gksudo with gksudo -g worked.
-- password dialog box hangs https://bugs.launchpad.net/bugs/152855 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
