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Cable Matters 201054 USB-C Docking Station with Dual DisplayPort Troubleshoot

Article ID: 89
Last updated: 15 Oct, 2018

System requirements

Not all USB-C ports support all features of USB-C. Some computers and smartphones only support data over USB-C for external storage such as flash drives while some devices support video and charging over USB-C. Check the below article about the USB-C port capability. If you are not sure, please consult the manufacturer for this information.

http://kb.cablematters.com/index.php?View=entry&EntryID=86

Connecting to displays with HDMI/DVI/VGA using DisplayPort video converter adapters:

Connecting to HDMI/DVI/VGA displays through a DisplayPort to HDMI/DVI/VGA adapter is supported. However, an active adapter is required. Passive adapters will not work. Please follow the links for active adapters.

DisplayPort to HDMI

DisplayPort to DVI

DisplayPort to VGA

Symptom: The Docking Station is not functioning properly on a Windows computer with Thunderbolt 3. Symptoms include no video, flickering video, or an unstable USB peripheral connection.

Solution: Update BIOS, Thunderbolt 3 firmware, Thunderbolt 3 driver, and Intel Graphics Driver from the manufacturer website. For more details, refer to articles below:

BIOS, Firmware and Driver Updates

Update Intel Graphics Driver

Symptom: Unable to achieve dual 4K video output and USB 3.1 speed at the same time

The dock utilizes a single USB-C cable to deliver video and data. Therefore, video transmission and data transmission  (including USB, SD card reader, and Ethernet) share the total bandwidth that USB 3.1 Gen 2 can offer. When a single 4K@60Hz display or dual 4K@30Hz displays are connected, there is not enough bandwidth for USB 3.1 data transfer speed. In this case, USB, SD card reader, and Ethernet speed will be limited at 480Mbps.

The dock features the Dynamic Configuration Switch. It allows users to switch between 4K mode and HD mode. Under HD mode, a single 4K@30Hz display or dual 1080p@60Hz displays are supported. In this case, users can enjoy up to 10Gbps USB transfer speed, UHS-II card reader, and Gigabit Ethernet.

Symptom: Unable to achieve dual 4K video output

When switching to 4K mode, the maximum number of displays supported are listed below.

Display Resolution Number of Monitors Supported
1920x1080 @ 60hz (Full HD) 2
3840x2160 @ 30hz (Ultra HD) 2
3840x2160 @ 60hz (Ultra HD) 1

Some 4K monitors do not support 4K@30Hz resolution via DisplayPort. In this case, connecting two of these monitors will result in one monitor at 4K@60Hz and the other monitor at 1080p@60Hz.

When switching to HD mode, the maximum number of displays supported are listed below:

Display Resolution Number of Monitors Supported
1920x1080 @ 60hz (Full HD) 2
2560x1440 @ 60hz 1
3840x2160 @ 30hz (Ultra HD) 1

Symptom: Second display does not light up

When connecting two 4K displays, identical display models are recommended. The first display may be default output 4K 60Hz resolution (if it supports 4K 60Hz) while the second display will only output 1080p due to insufficient bandwidth. Manually lower the refresh rate of the first display to 30Hz in

'Control Panel' > 'Display' > 'Adjust Resolution' > 'Display Adapter Properties'

Then manually increase the resolution of the second display to be 4K 30Hz.

If the second display is recognized in Windows but does not light up, most likely there is not enough bandwidth remaining for the second display. Again, manually lower the resolution of the first display and connect the second display in

'Control Panel' > 'Display' > Adjust Resolution

Some daisy-chainable displays have built-in MST functionality. In this case, the DisplayPort MST (sometimes called DisplayPort 1.2 or DP 1.2) must be turned off in the display settings.

  1. In the display configuration menu, look for the DisplayPort 
  2. Select the option to DISABLE DisplayPort 1.2
  3. Confirm the selection

You may need to reconnect the DisplayPort cable after making this change. If you are still experiencing issues setting up two monitors, please check the article below for further DisplayPort MST troubleshooting.

https://kb.cablematters.com/index.php?View=entry&EntryID=104

Symptom: Second display mirrors the screen of the first display on a Mac computer, certain Chromebook models, and Android devices

macOS and Android do not support the DisplayPort MST technology, which is required to support extended screen on the second display through a single video port. Chromebook may support the DisplayPort MST technology depending on the model number. The Docking Station only supports duplicated external displays on a Mac computer, Android device, or certain Chromebook models that do not support the DisplayPort MST technology.

Symptom: No signal when connecting to some monitors with DisplayPort input and output

The daisy-chainable monitors such as Dell P2415Q and P2715Q 4K monitors have two DisplayPort connectors. One of the DisplayPort connectors is for DisplayPort input while the other one is for DisplayPort output. The DisplayPort output is designed for daisy chaining a second monitor. Please make sure to connect this adapter to the DisplayPort input.

Symptom: Mouse lag or missing keystrokes when connecting a wireless mouse/keyboard to USB 3.0

The 2.4 GHz band is a widely used unlicensed radio frequency band for devices such as wireless routers and wireless PC peripherals such as a mouse or keyboard.

USB 3.0 has a 5 Gbit/s signaling rate. The noise from the USB 3.0 data spectrum can create a conflict in the 2.4–2.5 GHz range. This noise can radiate from the USB 3.0 connector on a PC platform, the USB 3.0 connector on the peripheral device, or from the USB 3.0 cable. If the antenna of a wireless device operating in this band is placed close to any of the above USB 3.0 radiation channels, it can pick up the broadband noise and cause interference. This may result in a decreased throughput on the wireless link.

The solution is to connect the wireless mouse / keyboard dongle to the USB 2.0 port on the back of the dock where the mouse/keyboard mark is located.

Symptom: The Docking Station is not recognized or one or more ports is not functional

Unplug all cables and peripherals, restart the computer, and then reconnect everything.

Symptom: Computer does not charge or charges at a reduced speed

This Docking Station can pass up to 80 watts of power to the computer. Some computers may require more than 80 watts. These computers may disable charging through USB-C or charge at a reduced speed.

Symptom: Audio is not transmitted to monitor through DisplayPort

Some monitors do not have built-in speakers. Therefore, audio must be transmitted separately. If audio is supported, please follow the steps below to select the correct playback device:

Windows:

1) Open the 'Sound' menu by searching or right clicking the sound icon on the taskbar

2) In the Playback Tab, select the display with DisplayPort

3) Click Set Default

4) Click OK to save the settings

MacOS:

1) Open the Apple Menu and go to System Preferences

2) Click the Sound icon

3) Click the Output tab

4) Select the display with DisplayPort

Article ID: 89
Last updated: 15 Oct, 2018
Revision: 16
Comments: 3
Tags
USB Dock DisplayPort docking station dual 201054 c dynamic configure

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