Comment 6 for bug 1630347

As the config file previously in the us-lightdm-theme source package is moved to us-default-settings, and us-default-settings is seeded for Ubuntu Studio, Ubuntu Studio users will not notice anything after us-lightdm-theme is removed during the apt-get dist-upgrade.

However, if us-lightdm-theme was manually installed by a user, or another package depended on it (which is not the case here - as it is only the us-meta packages that depend on it), then we would need a dummy us-lightdm-theme package (included in the us-default-settings source package) to force the user over to the new us-default-settings source package.

It is very unlikely that anyone would manually install the ubuntustudio-lightdm-theme package on it's own. And in this case, they could just keep using the us-lightdm-theme package as long as they liked (as apt-get dist-upgrade will not ask for it's removal). Therefore, I think the transitional package is a little over the top.

But expect a new diff including a dummy package uploaded here later today.