I've just updated to 18.10 from 18.04 and immediately hit a snag. My os doesn't boot anymore. It starts then comes to a moment when splash appears then it disappears and what I see is a message that [ok] Started Gnome Display manager. Sometimes it's something other but still no boot. Funny enough that if I hot ALT + F2 during boot it seems to restart gdm or something because I see how splash blinks and gdm loads, I can enter password and everything seems to be working. Well, my question is what could it be and how to fix it because it's quite annoying.
Specs are: AMD® Ryzen 5 1500x quad-core processor × 8 15,7 GiB GeForce GTX 1060 6GB/PCIe/SSE2