Update: Just now after resume the external Dell was stuck at 1024×768. Higher resolutions were not offered in Displays Settings.
Toggling the display Off/On there did not restore the correct modes. Unplugging the cable and plugging it back in immediately restored the full resolution list and correct mode. I guess there is a resume-time link/EDID failure and the original “no signal but still connected” symptom was just a different manifestation. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2161016 Title: [i915] External monitor no signal after resume (still appears connected, cursor moves there) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2161016/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
