This happens to me too. Bionic freezes on the splash screen. I can get in via recovery mode but that's it. Also this guy on Ask Ubuntu has a similar Xorg.0.log where at the end the power button, keyboard, and mouse get removed.
https://askubuntu.com/questions/1029384/can-not-start-xorg-after- upgrade-ubuntu-to-18-04 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1756511 Title: Xorg freezes on bionic kernel 4.15.0-12 Status in xorg package in Ubuntu: New Bug description: Similar thing that happens here: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1714839 The difference is that I can't log in. So it dies before it asks me to login. The workaround is to boot into an old kernel. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1756511/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
