I have experienced the same problem; gksu was taking > 20 seconds to complete. Workaround is to disable shadows under popup windows (ther compositor functions do not affect gksu performance)
Linux kfce14 3.13.0-35-generic #62-Ubuntu SMP Fri Aug 15 01:58:42 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/152855 Title: gksu dialog box hangs when xfce compositing is on To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gksu/+bug/152855/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
