Did you try to investigate around su and sudo? Because gksu calls them regarding the option you passed (or not). In my case, the source of the problem is sudo.
By the way, I did manually set a root password in command line with "sudo passwd". Then I can connect as root in command line using "su" (with no option). Probably that's why "gsku -w -u root synaptic" works in my case... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/949265 Title: GKSU says my password is wrong To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gksu/+bug/949265/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs