Not sure if this is a related issue. HP 850 G3 laptop with docking station, external VGA connected.
If the display blanks for more than an instant, the external display doesn't come back on until I undock and redock. This is OK: $ xset dpms force off; xset dpms force on This, on the other hand, leaves me with no external display: $ xset dpms force off; sleep 0.1 ; xset dpms force on Also possibly related or the same problem: if I dock with the VGA cable unplugged, and plug the VGA cable in, the external display is detected. Unplug, and it goes away. Plug it in for a second time and it's not detected again.... until I undock and redock, just like after a screen blank. This persists after updating to 4.8.0-32-generic #34~16.04.1-Ubuntu -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1643566 Title: [i915_bpo] Intermittent display outage with external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1643566/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
