[Pkg-xfce-devel] Bug#849159: xfce4-whiskermenu-plugin: Switch User depends on gdm
The xfce4 metapackage depends on xfce4-session which recommends
light-locker which depends on lightdm.
However, xfce4-whiskermenu-plugin uses gdmflexiserver (part of
libgdm1) to switch users instead of dm-tool which is provided by
Ubuntu has had a patch for a while to switch the default: