Was there ever a resolution to this. I am having much the same problem using my Dell Latitude 7480 running Ubuntu 18.04.2 LTS. In my case the behaviour that causes problems is that I have the laptop docked and suspend it - and then undock the laptop. When I attempt to restart the laptop (undocked) I get the same behaviour reported by the OP - i.e. laptop starts up and screen backlight comes on, but nothing is ever displayed. I can switch to a virtual console and use that normally including rebooting. There is nothing in /var/crash or on http://errors.ubuntu.com/ . I have tried killing a range of X related processes to see if I could get the GUI to restart - but without success.
My guess would be that the system isn't coping with the dock (with 2 external monitors) being removed while it is suspended. Let me know if any further system details would be useful. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802574 Title: laptop screen never comes on after undock / sleep / open of laptop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1802574/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
