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Pearsnet Author

Level 1

43 points

M1 Mac Mini, Displays wont turn on after wake from sleep

Ive a brand new M1 mac mini with 2 external displays 1 on USBC and another on HDMI. One is a samsung 32 4k and the other is an asus 28 4k. Both work perfectly with the mac ordinarily, however on wake from sleep often one or both of them wont turn back on. Turning them off and on doesn't seem to help but unplugging and replugging the cables into the back of the Mac Mini seems to get them working again. This seems to be rather random, sometimes its just one monitor sometimes its the other, sometimes i get graphical glitches on one of the screens (agains fixed by unplugging and replugging the monitor cable into the back of the mini). To me this seems like a software glitch with the graphics drivers I would assume the next update will fix this. I just wanted to flag it up to see if anyone else is experiencing the same thing?

Mac mini, macOS 11.0

Posted on Nov 30, 2020 1:21 AM

Top-ranking reply

Quinnessential Tunes

Level 1

13 points

Posted on Nov 30, 2020 10:28 AM

Disabling sleep does not work. I have seen this posted multiple times. I have disabled sleep in an effort to get my LG Widescreen monitor to be awakened by my M1 Mac Mini as well as tried every other way to get this to work and it just flat out doesn't work. Apple has a bug on their hands with this. I would advise against ANYONE buying the new M1 Mac Mini until Apple can address this issue. Any "time saved" by the processing boost of the M1 chip is more than offset by the constant rebooting and plugging-unplugging monitor cables all day just to get your desktop back when you step away for longer than 15 minutes.

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255 replies

hcsitas

Level 6

12,896 points

Nov 30, 2020 4:14 AM in response to Pearsnet

Not necessary, disable sleep, be happy.

hcsitas

Level 6

12,896 points

Nov 30, 2020 12:23 PM in response to Quinnessential Tunes

Are you sure it’s not your keyboard? Try wired.

Dec 4, 2020 1:33 PM in response to hcsitas

Disabling sleep is not a fix, it is putting a bandaid on a dirty wound. Just because you can't see it, doesn't mean the problem is gone.

hcsitas

Level 6

12,896 points

Dec 4, 2020 8:44 PM in response to dreamdev87

Er, it is actually. Sleeping the mini gets you nuthin’! Think of it as a vaccine with no side effects...

hcsitas

Level 6

12,896 points

Dec 4, 2020 8:49 PM in response to clintgray

Ah, the dongled monitor issue, an old, familiar problem. No fix for that I’m afraid other than to get a better dongle or better, a monitor that connects without one. Good luck!

Dec 4, 2020 11:56 PM in response to hcsitas

I am not looking for sympathy. This powerless user is just looking to find someone who might have knowledge of a display issue using a Mac mini with M1 chip.

hcsitas

Level 6

12,896 points

Dec 5, 2020 8:04 AM in response to TrafGib

Disable sleep, be happy.

trevoz

Level 4

1,990 points

Dec 5, 2020 3:42 PM in response to macrojd

What works for me - Monitor off after 15 minutes; Computer never sleeps.

Dec 7, 2020 4:33 PM in response to Pearsnet

I had the same thing happen with my new MBPro M1: an external monitor did not awaken.

Required unplugging everything (including power) and a shutdown/boot.

Dec 9, 2020 4:55 PM in response to hcsitas

Disabling sleep - is leaving the monitor on 24/7 the best fix? There were no issues with my Intel based laptop in terms of waking up the monitors by tapping any key on the bluetooth keyboard...

pheuter

Level 1

4 points

Dec 10, 2020 7:05 AM in response to Pearsnet

I have the same issue on my M1 MacBook Air, it may be a general issue with the new M1 macs—"Prevent computer from sleeping" does not help.

hcsitas

Level 6

12,896 points

Dec 10, 2020 8:34 AM in response to Initial DC

No, you can have it turned off by timer, but prevent the mini from sleeping.

hcsitas

Level 6

12,896 points

Dec 10, 2020 8:36 AM in response to pheuter

How many monitors? Dongled? Long cable? = problem.

pheuter

Level 1

4 points

Dec 10, 2020 8:38 AM in response to hcsitas

1 monitor, HDMI connection using Apple's USB-C Digital AV Multiport Adapter. Same adapter and monitor worked fine on my previous Intel MacBook Pro running Big Sur.

hcsitas

Level 6

12,896 points

Dec 10, 2020 8:40 AM in response to pheuter

Ah, dongle. Chuck it, don’t need it for the M1 mini.

M1 Mac Mini, Displays wont turn on after wake from sleep