20.04 i915 laptop external monitor turns off when inactive, must open lid to turn it on

Asked by Bjorn Helgaas on 2020-05-14

Dell 5520 laptop -> Dell Thunderbolt dock -> HDMI -> external monitor.
Running 20.04, i915 driver.

Laptop lid closed, using external monitor only. When external monitor turns off (after sleep-display-ac), keyboard/mouse activity should turn it back on, but do not. Opening and closing the laptop lid does turn the external monitor back on. Laptop is not suspended; I can ssh in from another machine.

Happy to collect any additional information.

Question information

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Ubuntu Edit question
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Last query:
2020-05-14
Last reply:
2020-05-30
Launchpad Janitor (janitor) said : #1

This question was expired because it remained in the 'Open' state without activity for the last 15 days.