Comment 27 for bug 15093

The patch at ( http://www.sudo.ws/bugs/show_bug.cgi?id=180 ) would allow gksudo to append its 'GNOME_SUDO_PASS' text onto the end of whatever the authenticating pam module outputs, meaning any challenge-response authentication won't be broken, but gksu will still be able to scan for its special text. It could then even strip this text and output whatever sudo says too, rather than just 'Password' that it does currently.

I think applying this patch to sudo, then patching gksu to use the new functionality is the best course. If the sudo patch is unacceptable (why?), then the only other reasonable course of action would be to make gksudo more than just a sudo wrapper.

Personally, I have the patch applied that lets the sudo prompt be overriden in any case, as an interim solution (not being able to authenticate with gksu is a pretty major bug...)