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Mac Mini M1 Will Not Wake Monitor After Sleep

This issue seems to be pretty widespread and yet I have yet to see a solution or report that Apple is working on a fix. I have a new Mac Mini M1 with 16 GB of RAM running Big Sur 11.2.3 and every time the computer and screen go to sleep, the computer will not be able to wake the screen up.


Actually, I get "No Signal" displayed on the screen after the Mini wakes so technically the computer wakes the monitor but it fails to send a video signal.


The screen is a 34" LG Ultrawide 4K Thunderbolt. It wakes fine with my 2018 MacBook Pro so there's nothing wrong with the display itself.


The only way I can get the Mini to send a signal to the display is to unplug and replug in the Thunderbolt cable. Sometimes repeatedly. Obviously, this is not an ideal solution.


Worse yet, the Mini will occasionally crash and reboot as I finagle trying to get the screen to wake up.


I have seen this issue reported on this forum and elsewhere with others having the issue with different monitors hooked up via Thunderbolt and HDMI so it's definitely a real problem.


I called Apple Support and logged the issue and it was supposedly going to be escalated. That was a couple of weeks ago.


Is there any chance that someone who actually works for Apple reads this forum and takes these reports seriously enough to take action? I need to know if I should return the Mini for a replacement or if there is a fix coming sometime soon.



Mac mini, macOS 11.2

Posted on Mar 23, 2021 8:34 AM

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7 replies

Mar 24, 2021 12:21 PM in response to hcsitas

As I said in my original post. The monitor works fine with my MacBook Pro and this is a widely reported issue with the Mac Mini M1. Again, as I said in the original post the issue seems to be that the Mini isn't sending a video signal upon wake up. The monitor wakes up but displays "No Signal" and if I unplug the Thunderbolt cable from the Mini and plug it back in it will.


Thank you for your comments and attempt to help but I'm looking for a real solution from Apple.

Mac Mini M1 Will Not Wake Monitor After Sleep

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