external monitor with 2019 mbp 2560 or 3840 res?

Started 3 months ago | Discussions thread
Tom_N Forum Pro • Posts: 17,922
Re: external monitor with 2019 mbp 2560 or 3840 res?

Chester McCheeserton wrote:

Adapter #s 6 and 7 were purchased from Fry's (both displayport to dvi) before arrival of the Caldigit dock, which informed me in the instructions that the adapter must be the "active" not passive type. Neither were labeled either passive or active, neither worked (the picture shows up on monitor, but blinks on and off continuously)

That's interesting. I had associated expensive and sometimes flaky active adapters with monitor resolutions greater than 1920x1200 pixels. Those require dual-link DVI, and I've never heard of passive adapters that could carry out that conversion.

I'm so accustomed to reading about people using cheap, passive, reliable single-link DVI adapters that I had not considered the possibility that some devices would not support them. Like, apparently, this CalDigit dock. Mea culpa.

https://blog.tripplite.com/whats-the-difference-between-passive-and-active-displayport-adapters

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