@molder A laptop with an Intel 620 would not be able to send enough video bandwidth through a regular USB-C dock to run dual 2560x1440 60 Hz. You can run either dual displays up to 1920x1200, or a single display up to 2560x1440 with only enough bandwidth left over for some compromised resolution/refresh rate setup for a second display. If you want to run dual U2719D displays from that system, you need to do one of these things:
Get a Thunderbolt 3 dock, which with your system will be able to tap into 4x more video bandwidth, enough to run dual 4K 60 Hz or triple 1440p. Note that only one of the system’s two USB-C ports supports Thunderbolt.
Connect one of the displays directly to the system so that the second display’s bandwidth requirements don’t have to be met over the connection to the USB-C dock. Use an HDMI cable or a USB-C to DP cable.
@molder Happy to help. In terms of your follow-up questions, the Hybrid dock uses “indirect display” technology called DisplayLink — not to be confused with DisplayPort — rather than tapping into native GPU interfaces as most docks do. The Hybrid dock’s reliance on DisplayLink means it would actually work for your display setup, but DisplayLink comes with some drawbacks that can be significant in some use cases, which I wrote about in the post marked as the answer in this thread. The Thunderbolt dock you’d want is this one.
In terms of using the dock and HDMI simultaneously, did you switch your display over to its HDM input if you had been using DisplayPort before? I suppose it’s possible that the system won’t allow you to use USB-C ports and the HDMI output for displays simultaneously, but that would be pretty unexpected. But if that limitation exists, you might find that a USB-C to DP cable would work since in that case both displays would be running from the system’s USB-C ports.
jphughan
9 Legend
•
14K Posts
1
April 26th, 2021 06:00
@molder A laptop with an Intel 620 would not be able to send enough video bandwidth through a regular USB-C dock to run dual 2560x1440 60 Hz. You can run either dual displays up to 1920x1200, or a single display up to 2560x1440 with only enough bandwidth left over for some compromised resolution/refresh rate setup for a second display. If you want to run dual U2719D displays from that system, you need to do one of these things:
molder
2 Posts
0
April 26th, 2021 06:00
Thanks a lot for your rapid response.
Two quesions:
Thanks again.
jphughan
9 Legend
•
14K Posts
0
April 26th, 2021 06:00
@molder Happy to help. In terms of your follow-up questions, the Hybrid dock uses “indirect display” technology called DisplayLink — not to be confused with DisplayPort — rather than tapping into native GPU interfaces as most docks do. The Hybrid dock’s reliance on DisplayLink means it would actually work for your display setup, but DisplayLink comes with some drawbacks that can be significant in some use cases, which I wrote about in the post marked as the answer in this thread. The Thunderbolt dock you’d want is this one.
In terms of using the dock and HDMI simultaneously, did you switch your display over to its HDM input if you had been using DisplayPort before? I suppose it’s possible that the system won’t allow you to use USB-C ports and the HDMI output for displays simultaneously, but that would be pretty unexpected. But if that limitation exists, you might find that a USB-C to DP cable would work since in that case both displays would be running from the system’s USB-C ports.