I-Tec Thunderbolt 4 doesn't work with two external monitors

[Kirchdorf]

Hi everyone

I am using a MacBook Air with M3 and bought a display docking station with two graphic chips. https://i-tec.pro/en/produkt/tb4dual...OTc1MS4wLjAuMA..

It is referring to DisplayLink and says, that it's compatible with the Macbook.

However, as I am using it with two monitors I can just use one at a time.

I can get to the point that when I'm closing the Mac, the picture switches onto the two external screens, when when I open back up again, I have the internal display, an external display, and sound on the second external display. But never I can drive all three monitors.

What am I missing?

[rboerner]

Originally Posted by Kirchdorf

Hi everyone

I am using a MacBook Air with M3 and bought a display docking station with two graphic chips. https://i-tec.pro/en/produkt/tb4dual...OTc1MS4wLjAuMA..

It is referring to DisplayLink and says, that it's compatible with the Macbook.

However, as I am using it with two monitors I can just use one at a time.

I can get to the point that when I'm closing the Mac, the picture switches onto the two external screens, when when I open back up again, I have the internal display, an external display, and sound on the second external display. But never I can drive all three monitors.

What am I missing?

According to the information provided by the manufacturer, your dock does NOT have DisplayLink technology inside of it. As a result, DisplayLink will not be able to assist you.

Your dock appears to be based on the Intel Goshen Ridge Thunderbolt 4 chipset. Your dock relies on the capabilities of the host computer in order to drive the connected displays.

The under the 'Display Support' section of the specifications of your Mac --> https://support.apple.com/en-us/118552 Apple says:

"Simultaneously supports full native resolution on the built-in display at 1 billion colors and:

One external display with up to 6K resolution at 60Hz

Close the MacBook Air lid to use a second external display with up to 5K resolution at 60Hz"

This means that when the laptop lid is open, you can connect one external display via Thunderbolt. If you close the laptop lid (and disable the internal display) you can use two external displays.

This behavior matches what you described, so it appears that everything is working as designed.

If you want a solution that allows for two external displays while the laptop lid is open, then you will need to use a product based on DisplayLink technology.

DisplayLink has a list of DisplayLink-based products here --> https://www.synaptics.com/products/d...ylink-products