Not sure if helpful, but I had similar issue - machine would not boot if (only) using external monitors. My computer is a Dell Latitude 5590; it had previously booted, upon power up, with the machine closed, thus using only external monitors.
In order to diagnose, I started to roll back updates, and struck lucky the first time: I rolled back my BIOS (which had been updated by Ubuntu), and then it all Just Worked like it used to. Not sure if related, but hopefully helpful. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1751268 Title: bionic desktop does not boot with external monitor attached - [drm:ironlake_crtc_enable [i915]] *ERROR* mode set failed: pipe A stuck / vblank wait timed out on crtc 1 To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1751268/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
