M1 Mac and LG Ultrafine Monitor Not Waking from Sleep Fix

Many people have had this problem where, intermittently, M1 Macs will fail to wake up their (LG) monitors from display sleep.  So instead of pressing a key on the keyboard to wake the display, you have to unplug the whole display and plug it back in to get it to be recognized again.

I couldn’t figure out why this was happening. But then I read somewhere on Reddit that a guy fixed the problem using one of those electromagnetic cable shield loops.  (can’t remember the name of it right now)

So I tried making a poor man’s electromagnetic shield with Aluminum Foil:

Poor man's foil electromagnetic shielding on monitor

And it worked!  This foil has been there for well over a week now and my M1 Mac wakes the LG display from sleep every time.

Now, if only my two different M1 Macs would not blaze my LG displays at 100% brightness almost every time they woke the display up. But that’s a subject for a different post.

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