What version of gparted were you running? Something similar to this was recently fixed in a very recent version of gparted.
** Changed in: gparted (Ubuntu) Status: Unconfirmed => Needs Info -- No devices detected in gparted https://launchpad.net/bugs/66676 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs