Why 5120x1440 Doesn't Work with Apple M1

Thanks however by right it should works with just USB C/TB3 to DP directly - it was worked for me until I tried the 11.2 RC3. Somehow something in that update brake this configuration :(

Are you on Big Sur 11.1? What brand & type of cable do you use?

Which make of cable are you using?

I got a TS3 plus with DisplayPort 1.4 and 120hz working so...

If you are on Mac mini M1 and the USB C/Thunderbolt ports seem to not working you may want to consider return it for repair/refund. Some people experiencing this including me.

Please let us know how it works with the dual input (if there are any color issues, brightness issues, motion issues, etc), and if you are using both thunderbolt ports, or one thunderbolt and one HDMI port... like may others, I want this to work...

I have the 2018 Mini and I have the same CRG9 monitor. After upgrading to Big Sur I get 5120x1440 with a single DisplayPort cable (not low resolution). I was going to “upgrade” to an M1 but I’m concerned I won’t get the same resolution.

Thanks not only for this information but not killing me, the messenger.

I am only reporting what Caldigit is telling me.

So, let me ask you...

Thunderbolt 3 (4k, 60Hz,40Gbps) -> Caldigit Dock -> Display Port Cable -> 49" Widescreen monitor

Will the new M1 Mini drive it in native 5120x1440 resolution?

Re: changing cables; no, didn't help in my case

Re: DP1.2 vs DP1.4: this shouldn't be necessary and may make M1/Monitor handshaking better BUT it made no difference in my case and then did not allow me to use higher freq nor HDR.

I'm running an M1 Mac Mini to an Acer XV273K 4k@120Hz monitor and I can not get it to work either. It's as if the resolutions supported by the monitor are not being communicated to the system. I can at max select 4k@60Hz and have tried multiple cables which otherwise work just fine from intel Macs to the same monitor. I have also tried disabling Freesync and/or selecting DP 1.2, neither of which had any impact.

I'm currently waiting for the Maxonar cable to arrive from Amazon. I don't see why it would work, but I'm giving it a shot..

Galapa - you have exactly the same setup as me. I too can get 5120x1440 but for some reason it says “5120x1440 low resolution”. I have a Mini 2018 also and that just shows “5120x1440” and both look identical. Not sure why the M adds low resolution. Do you get that text too?

2nd question. If you are getting 5120x1440 why are you also using switchresx?

Apple called me regarding the issues I have been having (two separate issues, pink dots while using HDMI and lack of signal negotiation when using USB-C to DP adapters (3 so far). They have asked me to bring in the monitor and M1 to try to further diagnose the issue of USB-C to DP not working the majority of the time. I will report back.

Ya, not that’s simple as I can’t even get the monitor with a cable matters c-do and no game 95% of the time. Just left my M1 with apple for a deep diagnostics. They saw the issues. They agree there is something wrong.

It’s the warning that comes with the app that worries me....

”It has been reported that the software is able to cause irretrievable damages to your computer.

Use at your own risk!

The project development has been stopped and won't be continued, if you want to be a maintainer consider opening an issue.”