Enable Windows night light on DisplayLink displays

I mainly use Windows 10 on my devices, which have lots of nifty features. One such feature is night light. I recently started using a USB docking station with DisplayLink support, which makes life much easier when switching between computers, but wanting to use the same accessories (monitors, keyboard, mice, speakers, etc.).

I was therefore disapointed that the night light feature was not working out of the box. A search showed me there is an article on the DisplayLink website that shows how to activate this feature also on DisplayLink displays.

1. Ensure you have a DisplayLink driver version of 9.0 or above. This can be checked in Device Manager in Display Adaptors > [docking station] > Driver. I have version 10.0.82.0 at this point in time.

2. Open Registry Editor and navigate to:

   HKEY_LOCAL_MACHINE\SOFTWARE\DisplayLink\Core

   Note: I did not have the keys DisplayLink or Core. If these keys are missing, create them.

3. Add a String value with the name EnableGammaRamp and the value true.

4. Unplug and re-plug the docking station.

5. Turn on night light.

If you wish to use a .reg file instead, paste the following into an empty .reg file and execute the file.

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\DisplayLink\Core]
"EnableGammaRamp"="true"