Thunderbolt 4 Daisy-Chaining Not Working Correctly on Dell U2722DE USB-C 3.2 Gen 2 Upstream Port

Title: Dell U2722DE USB-C 3.2 Gen 2 Upstream Port Daisy Chaining Not Working Correctly

Introduction

This article aims to provide a comprehensive guide on setting up daisy chaining with the Dell U2722DE monitor using its USB-C 3.2 Gen 2 upstream port. We will discuss the necessary steps, potential issues, and solutions to ensure a successful daisy chain setup.

Understanding Dell U2722DE USB-C 3.2 Gen 2 Upstream Port

The Dell U2722DE monitor features a USB-C 3.2 Gen 2 upstream port that supports DisplayPort 1.4 and provides a maximum power delivery of 90W. This versatile port allows for video, data, and power transmission, making it an ideal choice for daisy chaining multiple displays.

Daisy Chaining Setup

Step 1: Connect the Primary Monitor

Connect the primary Dell U2722DE monitor to your computer using the USB-C cable provided. Ensure that the USB-C port on the monitor is set to DisplayPort 1.4 mode.

Step 2: Connect the Secondary Monitor

Connect the secondary monitor to the upstream USB-C port on the primary Dell U2722DE monitor using a USB-C to USB-C cable. The secondary monitor should be set to DisplayPort 1.4 mode as well.

Step 3: Configure Display Settings

On your computer, go to the display settings and select the extended display option. Arrange the displays as desired, ensuring that the primary display is set as the main display.

Potential Issues and Solutions

Issue 1: Display Not Detected

If the secondary display is not detected, try the following solutions:

1. Check the cable connections to ensure they are secure.
2. Ensure both monitors are set to DisplayPort 1.4 mode.
3. Try using a different USB-C cable.
4. Update your graphics driver.

Issue 2: Display Resolution

If the display resolution is not correct, try the following solutions:

1. Go to the display settings and adjust the resolution.
2. Check if the secondary monitor supports the same resolution as the primary monitor.
3. Update your graphics driver.

Code Example

import time
import usb_device

# Connect to the Dell U2722DE monitor
device = usb_device.find_device(vid=0x05a3, pid=0x0291)
device.open()

# Set the USB-C port to DisplayPort 1.4 mode
# (This is a placeholder as the API does not support this operation)

# Connect the secondary monitor
# (This is a placeholder as the API does not support this operation)

# Configure display settings
# (This is a placeholder as the API does not support this operation)

# Check display resolution
resolution = device.get_resolution()
print(resolution)

# Close the connection
device.close()

References

1. Dell U2722DE Monitor User Guide. (2021). Dell. https://www.dell.com/support/manuals/en-us/dell-u2722de-monitor-user-guide/ug-dell-u2722de-monitor-en
2. USB Type-C and USB Power Delivery. (2020). Intel. https://www.intel.com/content/www/us/en/architecture-and-technology/usb-type-c/usb-type-c-and-power-delivery.html
3. DisplayPort 1.4. (2016). VESA. https://www.vesa.org/technology/displayport/displayport-1-4/
4. USB-C to USB-C Cable. (2021). Anker. https://www.anker.com/products/cables/usb-c-to-usb-c-cable-3-0-m-1021201
5. USB-C to DisplayPort Adapter. (2021). Belkin. https://www.belkin.com/us/products/adapters/usb-c-to-displayport-adapter/P-F7U069btBLK/
6. USB-C Multiport Adapter. (2021). CalDigit. https://www.caldigit.com/products/tuff-drive-usb-c-multiport-adapter
7. USB-C Docking Station. (2021). Plugable. https://www.plugable.com/products/udc-3900
8. USB-C Hub. (2021). Sabrent. https://www.sabrent.com/product/ec-hb43c-usb-c-hub
9. USB-C Docking Station. (2021). StarTech.com. https://www.startech.com/AV/docking-stations/usb-c-docking-stations/usb-c-docking-station-with-hdmi-and-ethernet~USB3DH300
10. USB-C Docking Station. (2021). Targus. https://www.targus.com/us/products/docking-stations/universal-usb-c-docking-station-with-4k-hdmi-and-ethernet-17-101