bug #841748 is the g-s-d issue, but as Robert pointed only the unity greeter uses g-s-d so reassigning that bug to lightdm because the gtk greeter will need to do that in some manual way
bug #841748 is the g-s-d issue, but as Robert pointed only the unity greeter uses g-s-d so reassigning that bug to lightdm because the gtk greeter will need to do that in some manual way