Mac mini 2018 doesn't work with HDMI switch

[KennyKW]

I have a newly bought Intel-based Mac mini running on Monterey. It doesn't connect to HDMI switches no matter what.
I have a 4K HDMI switch and another 8K 60Hz/40 120Hz/HDR 3-in 1-out switch, both are newly bought just in order to bring it up but no luck.

I used different 4K cables from both the mini's HDMI and Thunderbolt 3 ports, but no luck. The monitor is a Samsung 32" 144Hz monitor.

The problem is, it boots up ok in 2560x1440 mode. However, whenever I switch it to another device and back, it turns to 1920x1040 and firmly stays there no matter what, until the next bootup.

Any idea? Is it that all 2018 Intel-based Mac minis behave so, or is it just me?

Thanks.

 

[joevt]

What model HDMI switch?

Use SwitchResX to capture the EDID of the display without the switch. Then do the same with the switch. Does the Switch change the EDID?

 

[KennyKW]

What model HDMI switch?

Use SwitchResX to capture the EDID of the display without the switch. Then do the same with the switch. Does the Switch change the EDID?

It seems that EDID is changed. After switching the monitor is no longer recognized as Samsung but something else.


The left side is before the switching,



Monitor,



Thanks.

 

[KennyKW]

What model HDMI switch?

I bought two from Amazon.

One is a 3-in-1-out 4K switch, the brand is VWRHAR.
The other is a 3-in-1-out switch with 1 8K/60Hz, 1 4K/120Hz, and 1 HDR port. The brand is YIWENTEC.


VWARHAR 4K 3in1out,



YIWENTEC 8K-4K-HDR,

 

[joevt]

I suppose you could try making an EDID override that uses the real EDID of the TV to replace the EDID of the switch.
Or you can use SwitchResX to add the missing timings from the real EDID to the switch Custom Resolutions list.

 

[KennyKW]

I suppose you could try making an EDID override that uses the real EDID of the TV to replace the EDID of the switch.
Or you can use SwitchResX to add the missing timings from the real EDID to the switch Custom Resolutions list.

Thanks so much, joevt.

I actually returned the Mac mini and exchanged it for a new one. Everything works fine now. Thanks.

 

[tacman7]

I have a 4 x 2 Matrix that works for everything except the new mac mini M1.

It has a dip switch and it's all up is copy EDID of output 1 then set the first pin and it's copy EDID of output 2.

All the other options seem to be about sound routing...

I didn't have a second monitor when I tried it, I'll try the only other setting maybe.

Any help appreciated, Thanks

 

[tacman7]

Ok, this forum works great!, I ask a question then the problem gets fixed.

I tried another reboot and I can plug everything into one thing and not have to use the switch in the TV.