Comment 2 for bug 1810368

Some further information: As I'm intending to switch to MATE for preference anyway, I went ahead and installed the ubuntu-mate-desktop package and set gdm3 to default in the process (I believe it is already default for Bionic?); now on boot I see the MATE loading screen, am taken to the Gnome login screen, gnome-control-center opens. The halt-on-shutdown bug, another bug I've seen a few threads on with fresh installs, and had with my last install as well as this, was also fixed. So now I'm wondering, what has MATE changed during it's install to fix these bugs? Interesting.