Knowledge Base for Cable Matters Connectivity Products

Cable Matters USB-C to 8K HDMI and DisplayPort Adapter (201070) – Firmware Update to Fix Compatibility and Performance Issues

Article ID: 152
Last updated: 03 Aug, 2022

Cable Matters released a firmware update for its USB-C Dual Monitor Adapter. This update resolves several compatibility and performance issues. Follow the instructions below to update the device firmware.

Applies to

This firmware update applies to the following Cable Matters products:

Resolved Issues

This firmware update resolves the following issues:

  • HDR compatibility issues. The firmware update resolves HDR compatibility issues on certain combinations of computers and displays.
  • LG television compatibility issues. The firmware update resolves compatibility issues with certain LG 4K and 8K televisions models.
  • Dolby Atmos compatibility issues. The firmware update resolves Dolby Atmos audio issues.   
  • 1080p resolution lock on 11th generation Intel systems. The firmware update resolves an issue that locked 11th generation Intel systems to a maximum resolution of 1080p@60Hz.

Firmware Update Instructions

1) Connect the adapter to a USB-C port on a computer or laptop. Then connect a display to the adapter's HDMI or DisplayPort port. If you are using a laptop, connect an AC adapter to the laptop. 

2) Click here to download the firmware update tool. 

3) Unzip the firmware update tool and launch the “VmmDPTool.exe” program. If a prompt asks to run the program as an Administrator, click yes.

4) In the Debug tab, click the “FW version” button. The “Status” textbox should populate with information about the adapter. Check that the “Firmware version” field is less than  6.05.120.”

5) Click the “FLASH” tab, then click the “Load to FLASH” button. In the file open dialog, select the firmware file and click “Open.”

6) If a dialog box appears stating the Product ID did not match, click Yes to proceed with the firmware update.

7) Wait for the firmware update process to finish. When the firmware update process finishes, disconnect and reconnect the adapter from the computer. Verify the firmware update by clicking the “FW version” button and checking that the new firmware version is installed.

Firmware Update Troubleshooting

  • If an error message appears when first starting the VmmDPTool.exe program, ensure the program is running as an Administrator and check that the video adapter is connected to a display and the host computer’s video port.
  • If a dialog box appears stating the Product ID did not match, click Yes to proceed with the firmware update.

Version History

  • 7/7/22 – Firmware version 6.05.120
    • Resolved a compatibility issue with Dolby Atmos.
    • Resolved a compatibility issue that caused the resolution to lock at 1080p@60Hz on certain Intel systems.
    • Resolved a compatibility issue with HDR.
    • Resolved a compatibility issue with LG televisions.
Article ID: 152
Last updated: 03 Aug, 2022
Revision: 4
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