Windows 10: Buggy Windows 10 "Night Light" feature.

I was playing a game, an received and email. I then tried to alt tab to the Email but the game was full screen, and Email didn't show. Somehow, the Window setting dialog also opened, and I have no idea how, but whatever keypresses I was making, with the game still running, resulted in a couple of my system settings changing. Like "Airplane Mode" was turned on.


Further, the monitor's (I have two) "white level" started oscillating between white (like it's always been) to rather quite off-white, like following a sine wave. Eventually it stopped, but "white level" was left at an obvious off-white level. Interestingly, the mouse was a the original white level, and made it obvious just by holding over other "white" areas, like a web page, that something was wrong.


I searched all over, and could only find things regards Windows 10 color calibration dialog/wizard. Tried that, didn't fix. Restart, didn't fix. Tried changing color profiles, didn't fix. Reinstalled display driver (NVIDIA 1080), didn't fix. Tried screwing with NVIDIA's control panel, didn't fix. Restarting and running "safe mode" did have the correct white level, but going back to normal startup, and problem still remained.


Finally, after poking all around the Windows 10 Display settings, under the 'Color' section, I came across the "Night light" switch (never heard of this "feature"), which was in the off position. I then clicked on the "Night light settings" link directly underneath, and low-and-behold I saw the "Color temperature at night" slider, and it was on the left side from the middle. I slid it back and forth and the white level went from off white to the original white. So I was able to find the cause and fix the problem.


Very frustrating experience.


Further, as the "Night light" switch was Off, the white level should have nothing to do with whatever is set with the slider and so forth. I consider this a bug, and one that's likely sent many off on a wild goose chase with Color Calibration, and so forth.


-p

:)

 

Night light

Hi,

There are several reasons why you are having issues turning on or off the Night Light settings of your Windows 10 PC after the update. To troubleshoot your Night Light settings, we suggest that you apply the steps on this

thread that was provided by SurenderKhokhar on April 15, 2017.

Let us know if you need further assistance.

 

Night Light

Hi,

We recently have been receiving posts regarding Night Light after the Windows 10 Creators Update. To help you troubleshoot the issue regarding Night Light settings that are grayed out, we suggest to try to apply the steps provided by SurenderKhokhar
on this thread:
Cant use Night Light In Window 10

Kindly keep us posted for any feedback.

 

No Night Light

Hi, Ayuni

I am Wilfredo an Independent advisor And I'm here to help you!!

How you doing today?

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.drivethelife.com/windows-10/night-l...

Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised
on the site before you decide to download and install it.

I hope it helps you, have a nice day!!!