As told on IRC, I doubt this patch was tested. There is no reference of ubuntu.css in the postinst, and so, the alternatives is basically referencing itself.
In general, I'm really not a fan of that approach as told many times and would prefer an upstreamable solution. However, if anyone else wants to sponsor it, (after testing it) feel free. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1715722 Title: Allow safe override of GDM3 theme To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1715722/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs