I just experienced this, trying to launch an application (synaptic) requiring kdesu after a number of commands involving sudo in a konsole. All I got was the launch feedback, but no kdesu dialog. A 'sudo -K' actually helped, oddly enough. And no, I don't currently have a way to reproduce this.
-- kdesu fails when invoked immediately after sudo from terminal https://launchpad.net/bugs/72545 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
