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Level 1

21 points

M1 Mini issue with LG 27" 5K Monitor

I have a new M1 Mini running the LG 5K monitor from they Apple store. The monitor is recognized with the 5120 x 2880 resolution spec on boot or monitor reset (unplug and reinsert thunderbolt cable), but invariably falls back to a 3840 x 2160 resolution when the monitor goes into screen saver or sleep.

Three different thunderbolt cables have be used, a second LG Monitor tried, and have tried both Thunderbolt ports on the mini. A replacement Mac mini seems to be the last resort, but I feel this may be a bigger issue affecting others, and that a replacement will not fix this.

Is anyone running this monitor with Big Sur or ideally with the M1 Mini?

Posted on Dec 11, 2020 5:36 PM

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100 replies

lormov

Level 1

4 points

Feb 8, 2021 12:04 PM in response to mstrshikadance

Dis you check if the thunderbold cable is supported with 40gb/s in the system report?

vippiv

Level 1

10 points

Mar 10, 2021 7:03 AM in response to TBrown313

And my experience too... brand new M1 Mac Mini (less than a week old) and LG 5k display (three weeks old), same vertical pixel shift problem.

earns

Level 1

4 points

Mar 13, 2021 1:58 AM in response to Chris Wilhoite

Works for me since two days. Sorry for double posting...

Mar 16, 2021 1:51 PM in response to K9x3

go to the LG US website and scroll through software and drivers for your model, you want to download the most recent mac version of "On Screen Control"

Apr 16, 2021 9:27 PM in response to K9x3

Same issue persists on Big Sur.

I thought it was a cable connection problem so I went and got the Thunderbolt 3 Pro cable from apple but that didn't help either. I hope the next update helps.