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JBHaber Author

Level 1

19 points

M1 Won't Wake External Monitor

MacBook Pro w/ M1 Chip.

ViewSonic VX2770Smh

My external HDMI monitor was connect successfully the first time. Now, after the computer's lid was closed and it went to sleep last night, the external monitor fails to connect. Nothing I've tried has displayed anything on the monitor other than "No signal detected". I've turned it on/off, have disconnected and reconnected the HDMI cable. Nothing.

This is my first MacBook Pro. So maybe I'm missing something basic. But I can't figure it out.

Any hints or tips?

TIA.

MacBook Pro with Touch Bar

Posted on Dec 3, 2020 8:49 AM

Top-ranking reply

zuluimpi

Level 1

23 points

Posted on Dec 5, 2020 11:10 AM

I have the same problem. There is nothing wrong with your display - I am seeing comments relating to this for all M1 based computers. My Macbook Pro works fine with my display.

The one thing that works almost every time is:

unplugging the display, shutting down the mac, restarting the mac, logging in, and then finally, plugging in the display.

Far from ideal. Eagerly watching for a software update that I hope fixes this.

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Similar questions

40 replies

rozhasi

Level 1

43 points

Jan 16, 2021 11:59 AM in response to James Cook2

What kind of connection to the monitor?

Jan 16, 2021 12:33 PM in response to rozhasi

The monitor is HDMI so we're using a QGeeM HDMI to USB-C converter which works fine once it's reconnected.

rozhasi

Level 1

43 points

Jan 16, 2021 12:39 PM in response to James Cook2

Try this trick. If you use an external keyboard, start hitting the space bar on it repeatedly in a quick succession without a stop until the monitor wakes up. It could take 20 times or more.

Jan 29, 2021 4:36 AM in response to JBHaber

Ditto. No need to say more!

hpoole13

Level 1

4 points

Feb 9, 2021 5:42 PM in response to sirozha

Did you hear back from engineering? Any solutions?

rozhasi

Level 1

43 points

Feb 10, 2021 9:46 AM in response to Grant Bennet-Alder

DP1.4 doesn’t use any compression for 5K @60Hz.

Mar 15, 2021 9:53 PM in response to JBHaber

Now that I've updated my M1 MB Pro to 11.2.3 my external LG won't wake from sleep. It only turns back on after unplug and replug the display cable.

Mar 16, 2021 9:34 AM in response to emsko

Yeah, that wakes the MacBook, but not the external monitor.

shuyu192

Level 1

4 points

May 2, 2021 9:31 PM in response to Merlin1201

Hi! Does the Apple adapter work with your monitor? I had no problem using my external monitor for a few times, but now it’s completely not working. I’m wondering if it’s a problem with my adapter.

shuyu192

Level 1

4 points

May 3, 2021 5:41 PM in response to sirozha

Thank you for the advice!

M1 Won't Wake External Monitor