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January 24th, 2025 00:36
Cascading two Dell 2722DC Monitors
Hello,
I bought these two monitors which have Alternate mode with DisplayPort 1.2 which I was told is a requirement as per the article How to Daisy Chain Monitors for a Multi-Display Setup | Dell US
I have a laptop that works with a single USB C cable with two monitors cascaded in the office.
Can you please let me know how to cascade these two monitors at home. The article does not seem to provide enough details to be able to do this.
Thanks
Allen
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Andy K
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January 24th, 2025 13:04
You can't daisy chain on the S model. You will need to connect the 2nd monitor directly into the laptop, either by HDMI or USB C
Andy K
2 Intern
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January 24th, 2025 11:35
On the monitor that is connected to the laptop. Plug in a Dell Display port cable, to the display port OUT. There are 2 ports so you need to get the correct one. It usually has an orange cap over it.
On the second monitor, plug the cable into the Display INPUT port.
AJ2025
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January 24th, 2025 12:09
Hey Andy,
Thank you for your advice. Please find the user manual at the link below.
https://dl.dell.com/content/manual17323614-dell-s2722dc-monitor-user-s-guide.pdf?language=en-us
On Page 11 & 12 it shows all the input/output ports which are numbered 1 to 9.
Can you please let me know which ports you are referring to.
Warm regards,
Allen
Andy K
2 Intern
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January 24th, 2025 13:01
Does your model number start with S (Standard / cheap) or P (profesional) ?
My instructions were for a P model
DELL-Chris M
Community Manager
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56.8K Posts
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January 24th, 2025 16:28
To summarize, the S series monitors do not have the added DP out port necessary for USB-C/DP MST daisy chaining.
S2722DC video ports. Notice no DP out port. Only video in ports = HDMI 1/HDMI 2/USB-C
P2722HE video port. Has the DP out port = HDMI/DP in/DP out/USB-C
AJ2025
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January 25th, 2025 05:33
@Andy K Hey Andy!! Thank you for that clarification!! Much appreciated.
AJ2025
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January 25th, 2025 05:44
@DELL-Chris M Hey Chris, thank you for the detailed clarification. As much as I'm disappointed, it was probably the Dell article that gave me the wrong information.
In that article https://dl.dell.com/content/manual17323614-dell-s2722dc-monitor-user-s-guide.pdf?language=en-us there is a line that states as follows:
There are three types of ports that allow you to daisy chain monitors - DisplayPort with Multi-Stream Transport (MST), USB-C with DisplayPort alternate mode, and Thunderbolt Multi-Stream Transport (MST).
Maybe that line needs to be amended to state that one of the monitors needs to have a DP out port. I just picked up two monitors which had the 2nd option (USB-C with DisplayPort alternate mode) and the user manual for S2722DC states that USB-C port supports Alternate mode DP1.2.
From your response that article is incorrect and that one of the monitors needs to have a DP out port as well.
Thank you once again for clarifying.
(edited)
Chino de Oro
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8.1K Posts
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January 25th, 2025 11:54
The issue lies with your reading. You need to read the whole description or the whole instructions.
For port #5 in your comment above, you skipped the first sentence, that port was an upstream for connection to the computer.
For daisy chain article, you skipped the connection matrix that clearly show to connect between monitors, you need both input and output ports. Daisy chain needs DisplayPort In and DisplayPort Out or thunderbolt upstream and downstream. When shopping for monitors, you should check if it has both ports. Below is the connection matrix am talking about.