Windows 10: Windows10 night light mode not working consistently

Hello there,


I really like the new feature of night light brought by win10 - this saves my old eyes from the blue light. That's why I would like to activate the night light mode all the time. A typical problem for me is, when I use win+L to lock my screen and then log into my account again, the night light is gone. I have to either turn it off and turn it on again, or play a trick - I go to "setting-system", then the night light is back again before I go to "system-display" to set it up.


Some of my computer settings that might be clues: I set the computer to "never sleep" for remote desktop but the screen is set to "turn off after 5 min". I observe that my computer suffers from the switch between off and on during "win+L" lock, which is: it turns off but turns on after 1 second...


So, my question is: how to use the night light without getting it back every time after a "win+L"


Best,

Old eyeer

:)

 

Can't find night light mode in display.

Hey guys,

I just got this HP windows 10 laptop, and I tried to enable the night light function to help filter the blue light to protect my eyes from getting sore. I followed every steps online, "setting-display-night light mode"..but I reached to the "customize your display" instead of "display", and there's no such a thing called "night light"(pic shown as below). I would appreciate if you can help me with this problem, bring me back to the normal display setting to get my favourite night light turned on. Thank you!

 

No Night Light

Hi allisonb1

Try these steps

Option 1. Reset Night Light-related Settings on Windows 10 Fall Creators Update

If you find the night light in the Action Center or the Settings is greyed out after the Windows 10 Fall Creators Update, you can fix it with the steps below:

Step 1. Use Windows shortcut keys Win + i to open Settings.

Step 2. Go to the Privacy menu.

Step 3. On the left side, choose the Location tab.

Step 4. Click the Change button under the Location for this device.

Step 5. Toggle the switch under the Location for this device to ON.

Step 6. Toggle the switch under the Location service to ON.

Step 7. Restart the computer.

Now check the Action Center or the Settings on your Windows 10 Fall Creators Update to see if the night light feature is available.

Option 2 . Modify Registry to Fix Night Light Not Working on Windows 10 Fall Creators Update

If the methods above didn't work, you may need to modify the registry to fix the greyed-out night light button or the night light not working issue. Note: Windows Registry is a vital database on Windows OS computer. Any misoperation will cause server system
problems, such as 100% disk usage issue, blue screen issue, endless reboot, etc. So it's important to backup registry before the changes.

Now let's kill the night light not working and release the pain:

Step 1. Use Windows shortcut keys Win + R to launch Run.

Step 2. Type into regedit.

Step 3. Hit the Enter key.

Step 4. Copy and paste the path into the address bar of the Registry Editor: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\CloudStore\Store\Cache\DefaultAccount

Step 5. Press the Enter key.

Step 6. Right-click the key $$windows.data.bluelightreduction.bluelightreductionstate under the DefaultAccount and select the Delete to remove it.

Step 7. Right-click the key $$windows.data.bluelightreduction.settings and select the Delete.

Step 8. Restart the computer.

Then you can go to the Action Center or the Windows Settings. The night light not working issue has been resolved now and the night light button is available.

Source:

https://www.tenforums.com/tutorials/73518-turn-...

https://www.drivethelife.com/windows-10/night-l...

 

Night Light Setting and Third Monitor.

Hi Reagan,

We would like to ask you some questions in order assist you properly:

• Did Night light work previously on all three monitors?
• Have you made any recent changes to your PC?
• Are you getting an error message on the third monitor regarding Night light?
• Is the third monitor being detected by your PC?
• What troubleshooting steps have you performed so far?

While waiting for your response, we suggest that you try to connect your third monitor to what you are using on the 2 working monitors to see if it is only a loose connection issue.

Regards.