M1Pro (MBP 2021, 16inch) - Detects only one External monitor
 

Hi There,

I have a M1 Pro (MBP 16inch) with OS 12.4 and content is mirrored across both the external monitors. It used to work before!

The dock is the Dell WD22TB4 (https://www.dell.com/en-us/work/shop...pc-accessories)

I have tried to use a separate Intel based MBP with the recent most DisplayLink updated, and the results are the same.

The only way I could use both my external monitors is if I hard wire an HDMI and a Thunderbolt between my 2021 MBP and the external displays.

I tried to run the Display Link debug tool (log collector) and I can see that the system detects only the MBP display and ONE of the TWO external displays. This is also what MBP detects in my display settings.

Please advise!

According to the information here --> https://www.dell.com/support/home/en...-dock/overview the Dell WD22TB4 dock you are using does NOT have DisplayLink technology within the device.

Given that the docking station does not have DisplayLink technology within it, DisplayLink will not be able to assist you.