Ventura 13.2 - Mac mini M2 Pro - Two external display arrangement gets lost after waking up

Hello,

having my Mac mini M2 connected to 2 identical display (C43J89x) using the USB-C cables (no HDMI), most of the time when waking up the Mac, the arrangement of displays get lost.

The primary that was on left appears on right and vice versa.

each time I have to configure again the arrangement needed.

Seems an old problem because I detected message about this even for M1 series.

Was hoping that was solved with M2 Pro and extended external displays support but apparently not.

Do we have to have 2 different display model so that he can figure out which one is first and second ? Is it because they have both the same id and it's the first one that respond that get "primary" tag ?

Could we "just" not detected the port number on which it's connected ?


Just asking because this problem just make the feature to have multiple display useless in my case.


Posted on Feb 2, 2023 4:41 AM

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Posted on Mar 1, 2023 8:17 AM

macOS is bugged.


However, I installed BetterDisplay as a workaround and was able to set arrangement and resolution to load accurately each time.


it will also work for super wide displays with odd resolution.

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5 replies

Feb 4, 2023 2:45 PM in response to Jekkil

Hi Jekkil,


Thanks for posting in Apple Support Communities. Try assigning apps to specific desktops using the following guidance from Work in multiple spaces on Mac - Apple Support. This will allow apps to have a set location and should help. Does the same happen then?


"Create a space

  1. On your Mac, enter Mission Control.
  2. If you’re working with apps in full screen or Split View, their thumbnails are shown in the Spaces bar.
  3. In the Spaces bar, click the Add button .
  4. You can create up to 16 spaces.
  5. When you’re done, click the thumbnail for a space to open it."


"Assign apps to spaces

If you use two or more spaces, you can assign an app (or System Settings) to a specific space so it always opens in that space.

  1. On your Mac, Control-click an app’s icon in the Dock
  2. You may need to first open the app to show its icon in the Dock.
  3. In the shortcut menu that appears, choose Options, then choose one of the following:
    • All Desktops: The app opens in every space.
    • This Desktop: The app opens only in the current space. If you use the app full screen, it appears in its own space.
    • Desktop on Display [number]The app opens in the current space on a specific display (if more than one display is available)."


All the best.

Mar 1, 2023 11:44 AM in response to Jekkil

I have checked using HDMI and USB in place of 2 USB, then configuration is not altered after wake-up.

But refresh rate is less with HDMI than USB and resolution looks quite different (fonts raster out something like that)

Anyway I think it should be a big deal for engineers of MacOs to retain which screen is attached to which USB ports...


Mar 1, 2023 8:08 AM in response to faith185

Hello sorry for the late reply.

I can understand your way of thinking, but this will not help at all.

If I assign an application to a workspace (let say on my left monitor), when you login again (after resuming from sleep), my left monitor is placed again on the right, my app attached to the workspace on the left will show up then on my right monitor...


I think Apple should detect which screen is which based on usb port number.

The only solution I see is to change one on my monitor by connecting to it with HDMI and the other one with usb. But then why buying an M2 Pro then, my M1 is was doing that right...


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Ventura 13.2 - Mac mini M2 Pro - Two external display arrangement gets lost after waking up

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