USB-C to DVI dual link only getting resolution of 1280×800

Updated on 31-07-2019 in USB Type C
10 on 27-07-2019

I purchased the  USB Type C to DVI-I DUAL LINK Active Adapter and am connecting to a 2019 Mac Mini Thunderbolt 3/USB-C port. The monitor resolution is 2560×1600 but I’m only getting 1280×800 as my max option. The Mac Mini has displayport over alt mode which is required for the higher resolution. Any suggestions?

 
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0 on 29-07-2019

Hello Summerfield27,

Would you be so kind to provide the type (brand and model number) of monitor you are using? so that I have a complete picture. Just to be sure you are using the CAC-1510?

 

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0 on 29-07-2019

The monitor is a Dell 3007WFP-HC and yes, I’m using the CAC-1510.

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0 on 29-07-2019

Hi,

May i ask what cable you use to connect from the CAC-1510 to the Dell 3007WFP-HC? is it a single link or dual link DVI cable? a Dual link DVI cable is needed to get to the  2560×1600. 

were you able to do 2560×1600 before?

 

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1 on 29-07-2019

It is a dual-link cable. I’ve been using this monitor with an older Mac Pro with a dual DVI video card. I’m using the same cable with the new adapter. 

on 30-07-2019

i have this problem with a 2016 macbook pro 15″ with Radeon Pro 450 2048 MB and Intel HD Graphics 530 1536 MB and an apple A1083 30″ cinema display. native cord on apple goes into 1510 which then goes into macbook. OS is 10.13.6 latest patches.

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0 on 30-07-2019

Hello All,

could you please try out the following solution.

Apple display settings will hide the resolution, so pls hold down the Option button on the Apple display resolution interface, and then click the zoom

position of the resolution interface to display the hidden resolution. Then check the real resolution.

 

Feel free to send feedback so it will contribute to the forum 🙂

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0 on 30-07-2019

My monitor now working at 2560×1600. I would have sworn that resolution wasn’t a choice when I tried adding it, but it is now and I was able to select it. When I did select it my screen went black for about 10 seconds and then it came up in the proper resolution. Thank you for your help. 

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0 on 30-07-2019

Hi Summerfield27

Thank you for the feedback.

Good luck with the CAC-1510

 

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1 on 30-07-2019

that works, but awkwardly. when I open display preferences, with or without option held down, it shows scaled is selected with only 1280 and 1024 available, the only way to access 2560 is to option-click ‘default for display’, which switches it to 1280 even with option pressed, then option-click scaled button at which time 2560 appears and then option-click that to obtain the full resolution. thank you. SO my question is, why does the driver think that my cinema 30″ display default is 1280? is there something you can change in the 1510 so the system defaults this display to 2560?

on 31-07-2019

Hi

Thank you for the feedback.

Good to hear that it all works.

to answer your question, that needs to be addressed on the OS side.

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