Windows 10: Night Light only active on main monitor after waking from sleep

I've been using Windows 10's night light feature for quite a long time now. Lately, on some evenings, my light light will only work on my main monitor, while the side monitors just have their normal colour. I think it only happens when the displays go to sleep from inactivity, and come back from being asleep.

I'd say I'm a pretty tech savvy guy but I don't really know where to start troubleshooting this. It's not a huge problem, since the night light turns back on if I disable scheduling and re-enable it. It's a nuisance to have to do that whenever I'm away from my PC a bit, though.

If anyone knows a permanent fix, or has any idea why it is happening in the first place, that'd be much appreciated.

submitted by /u/ririshi
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:)

 

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.

 

Night light off after screen wakes from sleep

I have the issue that night light is always off when my screen comes back from a (blank) screen saver or the PC wakes from sleep. This has been mentioned several times but the recommended solutions do no address this issue but the issue that night light
is not working at all. So to clarify, night light is working, it is just off when the screen comes back from screen saver. If I then check the night light setting, it is enabled and the slider is in the correct position but I need to briefly click on the slider
for the feature to actually come on again. This is rather annoying as I often work at night and need to do this several times a day then.

Is there a solution for this? And again, please do not post any links on "how to fix night light not working" because it is working. It is simply off after waking from screen saver.

BTW I am on an HP ZBOOK 15 G2 laptop with NVIDIA Quadro 1100M and Intel HD 4600 (which Windows has stopped with Code 43 - I tried many things including the usual driver roll-back/update/removing hardware and letting it autodetect again etc, but have not
been able to resolved it, so I assume that the system uses the NVIDIA card only - on the latest drivers). I run WIN 10 Pro, ver 2004 and am using an external monitor AOC Q3277.

Thank you.

 

Night Light Settings

Separately from the Night Light, is the brightness options also disabled? If so, I might recommend these steps to make it work again:

1) Right-click Start button, choose Device Manager

2) Find the "monitors" section in the list and expand it

3) Right-click and uninstall every item listed under the monitors section

….. note: don't accidentally go to the "display adapter section", leave that one untouched.

4) Click the "scan for hardware" button on the toolbar up top (the icon with the magnifying glass inside it)

5) Try brightness and night light settings again