I can confirm this when I upgrade to 2.15.0-0ubuntu8. Gnome-mount is in universe,this must in the main repositories.
-- gnome-volume manager depends on gnome-mount, which does not exist https://launchpad.net/bugs/71432 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
