Mac Mini (M1) 2020, LG UHD monitor flickers on dark colours.

Hey all, after months of being annoyed by this issue on my 32" Dell 4K screen, found this thread and tried most of the suggestions, In the end the one that works for me is changing the screen color profile to "Image P3", and it was solved instantly, and if anything, the picture just looks clearer now, even when there's no condition that causes the bars and flickering.

I have this problem too with mac mini m1 and Asus 4k (VP28U) monitor with HDMI cable

i don't know what i have to do

Should i change cable or monitor?

And i don't understand ,problem is m1 or monitor.

I've realised users with another monitor had same problem. i hope apple fix this problem cause it's very annoying

I am wondering why apple hasn't fixed this problem yet

Hi

Like you i bought vp28UQG Asus monitor and mac mini m1

i've have been using HDMI cable and flickering problem drive me crazy

Are you sure by buying usb3 to dp this problem disappear?

Have you ever noticed this problem after using usb3 to dp?

I too have an Asus VP28UQG 4K monitor. Supplied cable from Asus, I had ghosting and the vertical lines randomly. I upgraded to an HDMI cable that can handle 8K video to see if the additional bandwidth capabilities would eliminate the issue as others had mentioned. Issue still present but not nearly as much or as bad. Tried USB-C to DisplayPort and that produced no change and very similar to the supplied cable from Asus. I tried the display settings set to Display P3 and while initially appeared better, the issue eventually crops back up. Will be trying other settings with macOS Monterey, resetting of the monitor, but outside of that it would be nice if Apple would acknowledge and fix the issue.

Yep, still a problem for me with my Dell 3221QS UHD monitor. It is better with the display and Mac in P3 colour space but it does still happen. I've found HDMI is a lot better than DisplayPort and having the monitor in RGB mode also improves things but the issue is still there. Having most of the screen dark grey or black seems to trigger it more than brighter colours.

Any solutions? Have the BENQ PD2700U and it's flickering nasty on my M1 mini. It comes and goes. It's fine until I open a program like Adobe then starts flickering nasty for a while. It'll fade over time but then come back. Tried HDMI and Mini Display cables. My ASUS is fine but the BENQ is giving me fits.

Yea not everyone has HDR and if that's the fix, Apple needs to fix the issue for non-HDR monitors. I did try resetting my Asus monitor and so far seems to be better but time will tell and also using more than just PowerPoint last night when testing/working.

Hi Folks! has this issue has been resolve?

I just bought my macmini few days ago and im encountering the same vertical line flickering issue.

The only thing i can find to solve is to lower the resolution but its to annoying for me due to image are not

properly proportion. So far im only using the HDMI port.

hey all I’m having a similar issue with an lg 34WL500-B and my M1 mini. Has anyone tried returning their display to the manufacturer for a replacement and seeing if another one works??? I have seen some reviews of my same monitor being used with the M1 without any issues and it’s frustrating 😮‍💨.

Also if anyone has other tips to try for hdr/wfhd/ips/hdmi monitors I would LOOOOOOVVVE to hear it.👍

just wanted to Provide an update for my issue: am in contact with apple rep at the moment, (good idea to buy apple care for frontier hardware). We went through the whole diagnostic run and still have no solid solution, but my rep has expedited the complaint to engineers and we are meeting again in another day or so.

What I have been able to achieve is a compromised workaround. I am using the 60hz setting on my display (LG 34 WL500-B) and the color prof "ColorMatch RGB". This paired with the no night shift, and no sleep/ energy saver mode tricks and some small tweaks in the monitor's hardware settings has gotten ride of the majority of the problem for now. I do my best to avoid the extreme color situations that seem to trigger the issue( brought yellow gradients, dark reds and large solid patches of green) and things are mostly ok for now. of course, this color profile is not ideal for color accurate work so I'll continue to dig for some more fixes. I'm going to try and switch from an HDMI>HDMI connection to a USB-C>HDMI cable and see if that changes anything.

I'll be sure to update here if anything changes!

I had this issue as well with a new Macbook Pro 16" M1, and an LG 34WL60TM ultrawide monitor. With my desktop background set to gray, I would see the flickering wherever there were shadows around the borders of windows. I was able to get rid of it by setting the monitor refresh to 60Hz (recommended by the monitor), and in the monitor's picture settings, setting the Black Level to "High":

Settings > Picture > Picture Adjust > Black Level: High

With this set to Low (default for the monitor), the flickering is always present.

Thanks for your advise !

My monitor was always flickering and ugly vertical lines appear especially when watching dark videos (on apple TV+, Netflix, Prime Video) ans also dark color websites.

I called AppleCare and we tried everything and even reinstalling( my current version is MacOs Monterey 12.2.1.

Now It worked for my 32UP50S LG 4K HDR monitor when I activated High Dynamic Range mode.

I also tried before with different HDMI cables, it was still flickering on my mac mini M1 2020.

I also tried with an Macbook air and my monitor works properly.

It is definitively a Mac mini problem and I don't know how to fix..

I am using LG 32UL500 monitor with M1 mini and was getting frequent screen black (like off-on). I tried many of the suggestions in this thread but the only thing that worked for me is changing the refresh rate to 30Hz. This makes the screen feel slow, especially mousing around, but it is much less annoying.

Hi everyone,

I’ve bought a refurbished Mac Mini M1. Arrived with Monterey 12.2.1. I hooked it to my LG 27”HDR 4K monitor which has been working well for more than one year with my old intel Mac Mini under High Sierra.

Soon the monitor started flickering and turning black.

The same beaviour hooked to HDMI or Thunderbolt ports, the only options on the new Mac Mini.

Then upddated to Monterey 10.3.1, worked fine for a while and then it started to go black showing the message “no signal entrance, going to sleep after 1 minute”.

A little search and I’ve found the problem with external screens and M1 chipset is well known but no sollution announced from Apple yet.

Before to return the Mini I’ve called the Support Service, one hour on the phone with six different people included a remote diagnostic session that showed “no problems” on my system or the answer : “Sir, we have never eard about this kind of issue”, “it could be a incompatibility problem with your monitor” or simply “have you tested it with other monitors?”.

Then I decided to return the Mini to the Store.

My opinion, the Support attitude was 10 over 10, the results was zero and worst, M1 is there from 2020 as this thread but there are no sollutions known from Apple.

I have the exact some problem. Flickering and sometimes vertical lines on the dark colours. M1 Mac Mini and an Asus 4k monitor connected via HDMI.