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

Hi everyone,

I’ve received yesterday the new display for my new Mac mini M1, the LG 32UN500-W.

the monitor works great except the whales out color while in HDR mode m, but that’s a know issue.

the most annoying issue it’s that the display randomly flickers and shows lines when the display shows dark tinted colours.

restarted the Mac issue persisted.

changed HDMI Cables, issue persisted.

Fully restored Mac mini in “recovery mode, issue persist.

the issue don’t happen on my 16” ‘Mac book with the same external display as Mac mini,

software glitch? Need to have the Mac mini replaced?

another thing that I’ve noticed is that the same display with the same usb c - display port cable plugged in the 16 k ches MacBook Pro, under the system profiler the external display can get detected correctly and even the serial number is reported, but nothing of this is visible on the Mac mini with the M1

Mac mini, macOS 10.15

Posted on Nov 28, 2020 3:42 PM

Top-ranking reply

DerekMac69

Level 1

4 points

Posted on Jan 12, 2021 4:25 PM

I also have the LG 32 UN500-W and have the same flickering issue.

When I boot the Mac mini, the sign on page background is all vertically lined (corrupted) until I sign in, then it's OK.

Also, if you visit this page: https://www.blackmagicdesign.com/products/davinciresolve/ there is a video playing at the top of the page, it causes terrible flicker.

I can get rid of the flicker if I go into the monitor settings and change the black level to "High"

(Picture -> Picture Adjust -> Black Level - High

Although this works, I would prefer not to have to set this, I don't like the look as much, the blacks look washed out.

Seems like a software issue to me.

Regards,

Derek

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

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