Login screen never appears on about 50% of boots
In the past week or two, Ubuntu 18.10 has failed to finish booting in about half of all cases (on multiple machines). The problem is that the graphical login screen never appears. Instead the machine stays on a text console.
gdm3 version 3.29.91-1ubuntu1
mutter version 3.29.90-1
I can force the system to finish booting and make the login screen appear just by switching VTs and back: Ctrl+Alt+F4, Ctrl+Alt+F1. Then within a second or so the login screen appears.