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181
September 22nd, 2024 05:58
S3423DWC & U2722DE KVM and MST
How can I get KVM working with 2 computers and daisy chain the 2 monitors to work together so I can swap dual monitors at the same time? I've turn on MST on U2722DE, but there's no MST option on S3423DWC. I tried to connect computer on U2722DE, use DP out from U2722DE to USB-C on S3423DWC but computer doesn't seems to recognize S3423DWC.
Any ideas or suggestions? Thanks.
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asmok
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October 2nd, 2024 18:32
I tried a straight DP to HDMI cable from U2722DE DP out and 1xS3423DWC HDMI in but that didn't work. So I did some research and bought the "plugable" DisplayPort to HDMI active adapter and that allows me to MST daisy chain from U2722DE to S3423DWC. The KVM can also switch between 2 computers from the U2722DE without problem.
My final setup are as follow:
PC1 USB-C out --> U2722DE USB-C to USB-C cable --> U2722DE USB-C in port (Video + Data) (Menu- Display- MST On)
U2722DE DP out --> plugable DP to HDMI adapter --> HDMI to HDMI cable --> S3423DWC HDMI in port
PC2 DP out --> U2722DE USB-C to DP cable --> U2722DE #4 DP in port (Menu- Display- MST On)
U2722DE DP out --> plugable DP to HDMI adapter --> HDMI to HDMI cable --> S3423DWC HDMI in port
1 last question I have is how can I adjust brightness of the MST daisy chain out monitor (S3423DWC in my case) with Dell Display Manager? It's currently detects the monitor, but the option adjust any settings are greyed out. Thanks.
asmok
1 Rookie
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4 Posts
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October 7th, 2024 06:54
DDM opened on S3423DWC as I've set it as the primary display.
Looks like I've solved my own problem by updating the firmware of the U2722DE to the latest version. I am able to synchronize the brightness and contrast for both monitors in DDM now. Thanks to those that provided suggestions and comments.
Andy K
2 Intern
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176 Posts
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September 22nd, 2024 12:25
The 2nd monitor doesn't need to have MST
You need to use a Display Port to Display port cable to connect the 2 monitors.
Does the S3423DWC have a display port ?
asmok
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September 22nd, 2024 21:13
The S3423DWC has a USB Type -C upstream (Alternate mode with DisplayPort 1.4, Power Delivery PD up to 65 W). I tried a DP to USB-C from U2722DE to S3423DWC but that didn't work.
DELL-Chris M
Community Manager
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56.8K Posts
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September 23rd, 2024 20:47
DP to USB-C will not work when trying to do MST daisy chain. That is a non-supported "up" conversion.
USB-C to DP should work when trying to do MST daisy chain but your S3423DWC does not have DP in. Only HDMI in. Your only option is to test a retail DP to HDMI cable. NO converters. A straight conversion cable.
In this case, the U2722DE must be the Primary in the MST daisy chain.
PC USB-C out --> U2722DE USB-C to USB-C cable --> U2722DE #5 USB-C in port (Video + Data) (Menu- Display- MST On)
U2722DE #6 DP out --> retail DP to HDMI cable --> S3423DWC HDMI in port
PC DP out --> U2722DE DP to DP cable --> U2722DE #4 DP in port (Menu- Display- MST On)
U2722DE #6 DP out --> retail DP to HDMI cable --> S3423DWC HDMI in port
DELL-Chris M
Community Manager
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56.8K Posts
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October 2nd, 2024 21:21
@asmok On which monitor is DDM opening on?