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

I have exactly the same issue. Single monitor, via HDMI connection, does not wake up from sleep. Fortunately, knock on wood, my monitor will connect if I turn it off and back on again. Whatever trigger the Mac mini is supposed to send out, to wake the monitor, does not seem to be working.

UPDATE - I received my new LG monitor today, as well as new Logitech MC Keys for Mac. With that new combination, pressing a key on the keyboard is waking the monitor from sleep without issue. I have continued using HDMI to HDMI rather than USB-C, as I wanted to leave those ports open.

I had this issue with my 2018 Mac mini, my 2020 m1 Mac mini, and my 2019 MBP 16". Seriously Apple, I know it isn't exactly an iPhone (much larger market), but how about addressing this issue... it has been constant for years.

The same monitor was used between the 2018 MacMini (i5 Model) and 2019 MBP16" (base model) and then I changed the monitor out (similar/updated model) and used that between the 2019MBP16" and 2020 MacMini M1. The monitor I have with the 2019MBP16" and MacMini M1 is the LG27UK650_600 (27" 4K Monitor). Oh, also had the 27" Alienware gaming monitor hooked up to the previous two machines (non-M1)... Also, at one point had a 13" MacBook Air 13" (entry level processor)... that was having issues too with the monitor not coming on out of standby.

Having this problem as well, however it has only just started. Was find for first few weeks. I have 2 Samsung 28in monitors connected, one through cdmi to cdmi, one USBc to display port. The monitors don't have USBC ports so this is my only option.

I do have the seperate spaces enabled, which is what I like this effectively gives me 4+ monitors.

I am running 11.1 so it obviously didn't get fixed in that update

I'm thinking the same thing about a powered hub and the mac turning off power to the ports, but then I also think, if the hub is powered, and it is still connected to the port on the computer that goes to sleep, is it going to matter at all if the port itself still sleeps? I am lucky enough to be able to minimize the problem so that all I have to do is turn my monitor off and on every few days or so as a remedy. I think at this point, I'm just going to have to wait for the next update. Kind of annoying with a computer and monitors that are about a month old now, but that'll teach me to get the first model of a new computer/OS right out of the gate. lol

Then you should stop contradicting yourself and ask a simple question - why you're still on this forum? Join the millions by disabling sleep on your mac, stop wasting your time here and allow others to continue working towards solving the actual problem.

My point exactly, but yours had better detail. It confirms what we know already, that support from the monitor manufacturers/sellers is non-existent, hence all the blame-traffic here.

That said, Apple's definitely at fault for not qualifying their dual-monitor claim with monitor brands that meet it all the way. After all, monitor manufacturers are not claiming dual-monitor functionality, Apple is. So I do sympathize with numerous complaints here, at the very least they've been mislead with a feature that isn't up to snuff (and probably never will).

For what it is worth, my monitor that would never wake up (without power off/on) was an Alienware (Dell) monitor. So, a bit of a common thread. Once I purchased my LG monitor there has been no issues.

I'm rather pessimistic and doubt they'll solve the actual problem for those of us not using DVI converter as they're very specific who should benefit from the update but we'll see anyway - thanks for posting this useful info and fingers crossed!

Just a quick update after a couple of weeks update and reading this forum's messages with other solutions:

• ticking and unticking Mirror Displays in Displays in System Preferences doesn't solve the problem and the sleepy monitor reoccured for me. I try not to touch anything (mouse/keyboard) and only use power/touch ID button to wake my MBA 13 M1 2020 - 80-90% of time it's waking my HDMI native monitor fine but it's still not 100% as my other 4 DisplayLink monitors that are alway waking up properly.
• moving very rapidly mouse so the cursor "inflates" solution posted by someone here has never worked for me

I’ve just had the same usb-c monitor problem from waking from sleep with my new Mac mini M1. 11.2 update had no effect. The Mac wakes up from the mouse and keyboard. Sometimes unplugging and replugging the USB-c cable works after a short while. Overnight always requires a hard reboot.

Thanks. I have a new LG 32UN880 and I am connected directly to my M1 Mac mini with a new high speed HDMI cable. I have hope if lots of people have this M1 and have no waking issues. I want to find the 'solution' not just a 'fix'. This is a new setup and I don't want a 'fix' for years. thanks. Apple is working with me on it as is LG and Logitech ( I am using their MX keys for Mac and have tried both the bluetooth connection and the USB receiver connection; both have the same, non waking issues). Are the new M1 laptops having the same issue of not waking?

I have a M1 Mac mini. Short of iPhone and iPad, this is the first Apple computer that I have ever used or owned. I was perturbed by my problem with the first monitor, for sure. Once I upgraded to the LG, all has been good. Even better with the latest Big Sur.

I believe that it is easy to get a tainted view if too much time is spent in forums where everyone is only discussing their problems. Happy users, not having issues, likely don’t tend to hang around in here spreading the positive!

Immediately after doing this, both monitors came on! However, the problem returned after waking from the next time the mini went to sleep. Trying it again did not help. I still have to disconnect the monitor that comes on--that leads to the other monitor coming on almost immediately. After reconnecting the first monitor, both go blank for a few seconds then come on. I have Catalina 10.15.7 and two LG monitors (a 4K and 5K).