Comment 6 for bug 1649682

I can confirm that this issue has been fixed in Ubuntu Gnome 17.04 (using GDM 3.24) onwards.

When trying to do an OEM install with Ubuntu Gnome 16.10, the issue still occurred as before. However in my 2nd try with UG 16.10, when I rebooted into the "oem" preparatory account after the hard drive installation, I installed the "gdm3_3.24.1-0ubuntu0.1", "libgdm1_3.24.1-0ubuntu0.1" and "gir1.2-gdm-1.0_3.24.1-0ubuntu0.1" .deb packages from the Ubuntu 17.04 repositories before preparing the system for the end-user. This ended up fixing the issue with that installation, confirming that the issue is present in GDM versions earlier than 3.24.

I used Ubuntu 16.10 instead of 16.04 in the above tests because 16.10 includes the oldest version of gnome-shell (3.20) supported by GDM 3.24 (as a dependency).

The work from this point on would be to find what fixed this issue between gdm_3.20 and gdm_3.24, and patch gdm_3.18 to fix this issue in Ubuntu 16.04 (which still needs to be supported until 2021).