LG Monitor 22MD4KA Ultrafine 4K 21.5" auto brightness?

Question

LG Monitor 22MD4KA Ultrafine 4K 21.5" auto brightness?

Hi,

I have just attached an LG 22MD4KA Ultrafine 4K 21.5" monitor to the new 2019 iMac I bought.

iMac has Radeon Pro Vega 20 4GB graphics and 16GB memory and is running the latest MacOSX Mojave 10.14.6

The monitor has an ambient light sensor but it doesn't seem to be doing anything as its screen remains at whatever brightness I set from System Preferences.

I have installed LG OnScreen Control that allows me to split the screen various ways and have also installed LG Screen Manager which immediately downloaded and installed the latest monitor firmware.

However, neither of the LG apps have any info about or controls for the sensor.

System Preferences show the monitor OK but there is no option (as in the iMac's screen) to automatically adjust brightness.

The monitor user manual just says to check that the Mac software is up to date, so that's no help.

Can anyone throw some light on this (no pun intended). There are no buttons on the monitor to get into the monitor's controls like an ordinary monitor.

As it was sold as a Mac monitor I'm assuming there is some (Apple?) software somewhere that will do the job.

Thanks,

Davo

Posted on Oct 3, 2019 4:54 AM

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Answer 1

tyskey

Level 1

109 points

Nov 23, 2019 4:42 AM in response to davofromulladulla

Hello,

I was recently told by LG representative in Japan that they are aware of the issue and since this is caused by the software and not the hardware, they are now developing a new Firmware update to fix this. Hope this will correct the problem soon :-)

Cheers,

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Answer 2

tyskey

Level 1

109 points

Oct 15, 2019 2:29 AM in response to davofromulladulla

I also have this monitor attached to MacBook Air 2018 (macOS 10.15) and the auto-brightness feature never comes up in the display settings panel.

The current “second generation” LG UltraFine 4k and 5k monitors do have auto-brightness feature working as I have confirmed in local Apple Store.

I think we need a clear statement from either Apple or LG regarding this issue on the first generation’s sensor (either the feature does or does not exist).

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