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Actually, I was mistaken. I turned it on and off, and the external monitor problem persists.
 
In case people think the M2 fixes this problem it doesn't. Upgraded to a MacBook Pro M2 Max and still having the same issue, possibly worse than with the M1 Mac Mini.

If I connect my ultra wide LG through a belkin thundebolt dock in clamshell mode then it won't display anything after a long sleep, like overnight. Even worse if I then open the laptop it refuses to connect via USB-C direct or HDMI. I restarted with it plugged in 3 ways and all of them worked.

I've had to go back to connecting the MacBook to the display via USB-C and another cable connecting to the thunderbolt dock for my peripherals. That one cable dream set-up for a macbook is not happening.
 
In case people think the M2 fixes this problem it doesn't. Upgraded to a MacBook Pro M2 Max and still having the same issue, possibly worse than with the M1 Mac Mini.

:rolleyes::(

This is more than annoying at this point. It has actually affected my daily workflow

I was thinking of getting a M2 Mac Mini (or Studio when it gets the M2 chip) but now I am going to wait and confirm that the M2 macs can actually work properly with external displays
 
:rolleyes::(

This is more than annoying at this point. It has actually affected my daily workflow

I was thinking of getting a M2 Mac Mini (or Studio when it gets the M2 chip) but now I am going to wait and confirm that the M2 macs can actually work properly with external displays

Spoiler, it doesn't.

Mac Mini M2 Pro here and displays constantly shifting around. I am trying out SwitchResX to see if it will fix it.
 
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13.3 is right around the corner but the release notes don't mention anything that sounds like this bug. Fingers crossed it does get sorted.
 
Damn - what IS with Apple nowadays????

(I have no insider knowledge) but from what I've read, it sounds like Apple has some issues in how they operate:

* Secrecy is paramount, so different groups can't coordinate and as a result we see weird bugs. Macs have traditonally for years had the absolute best multimonitor software support (compared to Windows, Linux...) Somehow with the M1 Macs, that knowledge was lost?
* Their bug reporting system and policies SUCK. The old Radar system was 100% private, and though they have tried to modernize with the new FB system (FeedBack app), most developers will tell you that submitting an official report is often no better then throwing something into a black hole. For example, I (and others) told apple about the new 13.3 screensaver bug on March 1st, and yet by March 26th or 27th they hadn't acknowlged it nor fixed it. In fact, there was zero activity on my FB case at all (sometimes an Apple engineer will ask for clarification, but not in this case)
* Apple contracts out a lot of stuff - I think they don't want to admit it, but increasingly large portions of the Apple ecosystem software are not built by Apple software engineers.
 
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Bring back the Apple of old: team of curly-haired bespectacled nerds in yellow polarnecks, working into the wee small hours by candlelight in some basement surrounded by empty beer cans and pizza boxes. None of them ever seen daylight since 1978. If a user reported a bug, they'd take it so personally that they'd strip naked and whip each other's pale-skinned sun-starved bodies with barbed wire as punishment.

Now the devs are just a team of highly paid businesspeople driving Ferraris with literally no loyalty to anything except the next paycheque. They give zero effs about the actual quality of the software and firmware they code.
 
Hi, for those of you that updated to Ventura 13.4 Final (released a few days ago), do you still have problems with multiple external displays and/or with ultra-wide display resolution problems ?
 
I took a chance, updated my 2018 MacMini to 13.5 and can say that external display to my 49" ultra-wide Dell U4919DW monitor works fine (USB-C to DP cable), and also no issues encountered with the two old 20" wide flat-panel displays on either side of the ultra-wide.

Keeping my fingers crossed it stays working as it is supposed to.
 
I took a chance, updated my 2018 MacMini to 13.5 and can say that external display to my 49" ultra-wide Dell U4919DW monitor works fine (USB-C to DP cable), and also no issues encountered with the two old 20" wide flat-panel displays on either side of the ultra-wide.

Keeping my fingers crossed it stays working as it is supposed to.

On closer observation, my 2018 MacMini updated to MacOS Ventura 13.5.1 is not "working fine" with my 49" ultra-wide Dell U4919DW monitor; for some bizarre reason Ventura does not recognize the default resolution to be 5120x1440 (it thinks the default resolution is 2560x720).
So that means Ventura is most likely doing some scaling and thus not displaying as optimal natural resolution.

Dell's manual clearly states the U4919DW native resolution is 5120x1440 and Monterey clearly recognized it to be that as well - only Ventura seems to have gone backwards in time to when ultra-wide displays didn't exist yet.

Screenshot-20230818_Dell-U4919DW.png


And . . . I just don't understand why Apple insists to force MacOS to use System Settings that is formatted for the physically much smaller iPhone display size - on the Mac it won't even resize horizontally !
At least the previous System Preferences took advantage of the Mac's much larger physical display size to make it much easier to see all the configurations and navigate efficiently.
This System Settings is just completely unintuitive on the Mac, to the point of being nearly useless.
Just because MacOS can now run on silicon doesn't mean it needs to be stunted to look like the equivalent feature on the iPhone.
 
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And . . . I just don't understand why Apple insists to force MacOS to use System Settings that is formatted for the physically much smaller iPhone display size - on the Mac it won't even resize horizontally !
At least the previous System Preferences took advantage of the Mac's much larger physical display size to make it much easier to see all the configurations and navigate efficiently.
This System Settings is just completely unintuitive on the Mac, to the point of being nearly useless.
Just because MacOS can now run on silicon doesn't mean it needs to be stunted to look like the equivalent feature on the iPhone.
I hear you loud and clear but unfortunately UX harmonisation between iOS and MacOS is well underway. Which is something I once hoped for, except I wanted it the other way round.
 
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