Displays constantly rearrange

Question

Level 1

68 points

Displays constantly rearrange

I am experiencing an issue with a Mac Studio where my monitors sometimes rearrange after sleep and also sometimes rearrange after a reboot.

Similar to this issue: Displays constantly rearrange - Apple Community

Details:

Monitor 1 is an LG UltraFine UHD 27UN850-W connected to the Studio via USB-C cable.

Monitor 2 is a BenQ BL2420PT connected to the Studio via a DisplayPort to USB-C cable.

Monitor 3 is a BenQ BL2420PT connected to the Studio via a DisplayPort to USB-C cable.

The LG UltraFine UHD 27UN850-W is the 'main' monitor.

Running Mac Studio Ultra 2022, 128 GB Memory, MacOS Ventura 13.1.

I've tried replacing the cables. I've tried connecting the LG UltraFine UHD 27UN850-W with an HDMI cable instead of a USB-C cable. On the BENQ monitors, I've tried using HDMI to USB-C cables. None of this helps- problem persists.

This is a new Mac. I did not use Migration Assistant to move my files from my old iMac.

In Settings, I have "Displays have separate Spaces" toggled on. If I disable or toggle off "Displays have separate Spaces," the problem persists. So it does not matter if "Displays have separate Spaces" is toggled on or off. When toggling this setting on/off, I always reboot after I make a change.

When the monitors randomly rearrange after resuming from sleep and/or after a reboot, I have to go to System Settings --> Displays --> Arrange --> and rearrange them.

How can I resolve this issue?

Mac Studio, macOS 13.1

Posted on Jan 23, 2023 04:05 AM

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Answer 1

JJRASC

Community Specialist

Jan 24, 2023 06:44 PM in response to Peter Caton

Hello Peter,

Thank you for posting to the Apple Support Communities.

It would be suggested to test connecting your displays when your Mac is started in safe mode. Please follow these instructions: Start up your Mac in safe mode.

You can also find helpful information in this Apple Support article: If your external display is dark or low resolution. If the issue persists in safe mode, please contact Apple Support directly for more help.

All the best!

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Answer 2

Jan 25, 2023 03:44 AM in response to Peter Caton

This is a known problem with two exact same displays using the exact same type of connection.

I don't know of a solution, except to connect them differently, as in one using DisplayPort and another using HDMI

(of course, whether it's even possible depends on the connectivity options of the displays).

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Answer 3

Peter Caton Author

Level 1

68 points

Jan 26, 2023 10:43 AM in response to Luis Sequeira1

I connected one of the DisplayPort monitors to my Mac Studio using a straight HDMI cable. The problem still occurs. So one monitor DisplayPort to USB-C. One monitor USB-C. One monitor HDMI.

Another problem (not new, but related) is that programs will randomly rearrange themselves. So if I have a program on my left monitor, for example, sometimes it moves to the right monitor or vice versa.

Is this an issue that just occurred in Ventura? I had been using a 2013 iMac, which was stalled on macOS Catalina. I never had an issue like this before.

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