Erm, disregard all that, like N hours later I discovered that the display's power button and reconnecting the DP cable weren't enough-- finally unplugged the whole display from wall power, in desperation, and it came back online just fine. Must've been a false correlation with the upgrade, or just some transient screwed-up state in the display's circuitry triggered by a reboot. Sorry!
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1204246 Title: External display nonfunctional To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1204246/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
