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

Unlike my 2018 Intel Mac mini where the computer wakes but not the display, the 2020 M1 Mac mini does not wake (ssh cannot connect and times out) and so the monitor does not wake. My solution for the M1 is to push the power button twice and then both the mini and the monitor wake. My power button is at the default (ie it functions to sleep the mini).

For me, if a second user is logged in. The screen when it goes to sleep or screensaver, won’t wake

sometimes it gives me a weird moving static pattern or times it locked to thr screen saver and unable to wake

logging out secondary users fixed the issue for me

I just wanted to update my earlier issues I experienced with my new M1 MM not waking. I bought a new M1 MM (2tb - 16gb) on Jan 16, 2021, and it would not wake from sleep. It would turn on fine if it was shut off. Tried LOTS of things and after working on the new M1 MM for two weeks, with all levels of tech and engineer assistance, I returned the new M1 MM to Apple and had the exact M1 MM model and setup sent to me again. The new one has worked flawlessly right out of the box. One month later...never had one issue. New Logi MX keyboard for mac and Logi MX Master3 mouse working on Bluetooth. No Bluetooth issues either. KB and mouse are 18" -24" from M1 MM. I am using my LG 32UN880 monitor with an HDMI cable to save one of the M1 Thunderbolt/usb4 ports. I have a 2tb Sandisk SSD (550Mb/s) connected to the M1, on one of the thunderbolt/usb4 ports, and always on. I also keep connected an older usb3, 2tb WD passport SSD connected to the M1, on one of the usbA ports, and always on. The waking issue for me likely had to be a hardware issue as all software, cable, positioning, timing, etc... was ineffective at solving the waking issue. I only use this for Adobe PS, LR, and some light music and video youtube stuff. Good luck to all who have issues. This new M1 has been working flawlessly, so I guess I will keep it. If I would have had 1 iota of issues, I WOULD have sent it back again and waited for the new M1X.

My new Mac Mini M1 would not wake up until I removed the USB C FlePow hub from the computer. With my USB 3.1 hub and my logitech camera and headset plugged into the hub, the Mac Mini would not wake up. Now, I have to keep the hub unplugged in order to be sure the computer wakes up. Then I plug the USB hub back in when I need those devices. Same problem with other hubs I tried.

I have been having problems with my M1 mini: Both that the screen will not wake up if the power saver has put it to sleep and also that my bluetooth keyboard has been bogging down severely, usually when I am trying to wake up the monitor. I have made two changes that seem to help, though i have not worked to isolate the problems further.

I replaced my (third party) uni directional usb-c to displayport cable with a 3' bi-directional Amazon Basics cable. I have had no problems with the display waking up since.

Secondly, I read that it is possible for bluetooth devices to be too close together, so i have increased the distance between the Mini and (the Logitech keyboard & Apple trackpad). Currently, that distance is about 18"; and I have had a single reoccurrence of the bluetooth issue, which is a vast improvement.

Have the same issue with my 4k samsung monitor on mac mini. I have to monitors hooked up and only the 4k always fail to open after sleep. Tried the suggestions here but what worked for me was lowering the display refresh rate to 50 hertz. So far so good.

I have the same issue with my M1 mini using the HDMI port - will not wake up after display sleep (prevent computer sleep is off in Energy Saver). Have upgraded OS to 11.3.1 but that did not help. Am using a high quality 8k HDMI cable and have tried several other cables, nothing seems to help. Have gone back to using the USB C port for video which works fine but then I lose a USB C port. Am using a BenQ SW271 4k monitor.

[Edited by Moderator]

My issue is also with the display attached via USB-C. It began after the 11.3 update and persists with 11.3.1.

Disabling "Displays have separate Spaces" did not fix it.

What appears to have fixed it for me was to swap the display priority. Making the USB connected display primary, and the internal HDMI secondary.

I was having this problem and greatly improved it by getting a bidirectional thunderbolt to viewport cable. Amazon Basics sells one. It has happened a couple of times since I replaced a unidirectional cable, but turning the screen off and on works now without disconnecting it. I would also look at separating the display cable from power cables to avoid interference. I’m not sure this matches your setup, but hopefully it helps.

I have similar issue. Only obvious difference to OP is that I do have only one external display (LG TV) connected to my Mac Mini (2018), Big Sur 11.5.2 .

Typically it won’t turn on display after going sleep (sometimes even after a few seconds) in approx. 25% attempts.

The most strange observation is that if I exit Safari before Mac goes to sleep, this issue does not occur anymore, at least 20 times in a row.

A quality HDMI 4k-8k cable from Belkin HDMI 2.1 solved all my problems. Cheap cables seemed to work but created a lot of problems and interference.you need a cable that supports HDR

When you have two monitors but only one wakes up from sleep:

System Preferences / Mission Control / De-Select “Displays have separate Spaces” / Log Out / Log In

It seems that any USB-C to X other than USB-C causes the issue; also HDMI to HDMI is fine. I've moved to HDMI which frees up one of the two TB/USB-C ports as a bonus.

Try to update it to MacOS 11.5.2, there are reports that this update fixed the issue.

Seems fixed at monterey 12.1 so far...