Monitors go blank after closing lid

[timhenn]

Originally Posted by abouzeidfamily

I just resolved this one for me. I have an M1 processor on a Macbook Air 2020. I resolved the issue by plugging into a power source.

Thanks for this. I do have external power plugged into my Macbook so this "fix" didn't work for me.

Took all weekend to get a complete backup done, now I will proceed to upgrade to Monterey and see if the clam-shell mode works and my dock-related-performance issues go away entirely. Will post back.