LG Monitor Support

[molokai_man]

Installed
macOS 10.12 (16A320)

Immediately, my LG ultrawide monitor stopped working correctly. Could not find the proper resolution, even option-clicking "scaled" revealed a limited list of resolutions.

Had worked just fine for two years. Distortion now makes monitor nearly unusable.

 

[accentaudio]

I've noticed similar anomalies. Like upon boot there's about a 2 second horizontal flicker near the top of my screen. This never happened until Sierra. I'm thinking Apple has changed something with external display support. I'm using a 32" BENQ. Bummer.

Installed
macOS 10.12 (16A320)

Immediately, my LG ultrawide monitor stopped working correctly. Could not find the proper resolution, even option-clicking "scaled" revealed a limited list of resolutions.

Had worked just fine for two years. Distortion now makes monitor nearly unusable.

 

[molokai_man]

I've noticed similar anomalies. Like upon boot there's about a 2 second horizontal flicker near the top of my screen. This never happened until Sierra. I'm thinking Apple has changed something with external display support. I'm using a 32" BENQ. Bummer.

Agreed, bummer. This happens with my Ultrawide 25, but my LG Ultrawide 34 works perfectly, oddly. So I am dumping the 25 and buying a second 34. Cant afford to wait for Apple to figure it out.

 

[accentaudio]

I wonder what is going on? I hope anyone having weird issues or graphical anomalies with their own external display is reporting it to Apple. I have reported my issue.

 

[molokai_man]

I reported mine as well. But my experience with Apple has been "don't hold your breath".

FWIW, Samsung tech support spent 30 minutes trying to help me solve it. So kudos to them.

 

[accentaudio]

Agreed! It's liable to be macOS 13 before there's a fix.

I reported mine as well. But my experience with Apple has been "don't hold your breath".

FWIW, Samsung tech support spent 30 minutes trying to help me solve it. So kudos to them.

 

[DaDalle]

It's not just widescreen monitors. My 1440p ASUS Monitor doesn't show the native resolution with hdmi.

 

[scrmtrey]

Maybe you need force rgb script. (Force rgb mode and maybe native resolutions).

 

[accentaudio]

Here is what I see upon boot. Never saw this ugliness on any other version of OS X.

 

[dg4prez]

I've spoken with Tim Cook's office about this over the phone a few times, and ended up speaking to some engineers. I'm told this will be fixed in the next build - this was late last week. Not sure what the timeline for that is, I assume either today before release, or as a patch after release.

 

[Hung_Solo]

I have an LG 27UD88 monitor so if there seems to be issues with Sierra and external displays I may wait to update until this is resolved.

 

[shinji]

Has anyone had an issue with the 23" Cinema Display?

 

[frankdogg]

this is the only thing preventing me from upgrading the OS. hope it gets fixed asap.

 

[accentaudio]

dg4, I'm sorry, but I don't believe you talked to "Tim Cook's office" or any engineers. Also, as of today's final release these issues still remain. Maybe you can call Tim Cook back so he can let his engineers know lol...

 

[DaDalle]

had anyone the chance to test the 10.12.1 Beta? Is the issue still there?

 

[accentaudio]

had anyone the chance to test the 10.12.1 Beta? Is the issue still there?

Wondering the same thing... Quite crazy that Apple is letting this external monitor thing slip through. Really makes me believe they are about to drop some new displays for sale and this is their way to get people to buy them.

 

[molokai_man]

It's pathetic. Fixing this is a couple lines of code and a library.