I am having the same problem as user here . Ho can i close laptop lid and continue working on the external monitor? I already set my ext. monitor as default and set lid close action to lock screen. Other options are unacceptable (computer suspend, turn off screen).

postcd, Uncomment line in file /etc/UPower/UPower.conf IgnoreLid=true And you could disable built-in laptop display in Display settings near selectbox with display name. Or make external default one. That’s need in case when some prompt window appears, like prompt for entering password in Fir…

Laptop lid clopsed means external monitor goes black screen

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maycne.sonahoz 18 October 2020 17:31 8

Have you tried the last two suggestions there ?