Night light constantly on though it isn't turned on Solved

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  1. Posts : 4
    Windows 10
       #1

    Night light constantly on though it isn't turned on


    Hello!

    I've been facing this issue on my laptop for a few days now. Every time my system starts up, after logging in, the colour temperature of my screen changes from the normal tone to a more reddish one, just like what Night Light does, though Night Light is not enabled. Enabling and disabling Night light makes no difference to the screen temperature.

    I tried reinstalling my graphics driver, but that didn't help. I've tried installing several older versions of the graphics driver, to no avail. I've also tried updating the BIOS to the latest version. My Windows is always up to date (as up to date at the automatic updates get me).

    Once when I uninstalled my graphics driver, the issue went away until I restarted - and the driver reinstalled. Installing the app f.lux also helped for a couple of days - except for a flicker of reddishness now and then, it was mostly stable. But I'm back to the yellowish screen now.

    The issue does not appear on the login screen, only after logging in. And it started noticeably after I disabled Microsoft Teams (where did it suddenly pop up from anyway?) from startup - though I cannot confidently say this exactly when it began.

    I'm on Windows 10 Home, v. 1903, OS Build 18362.295. The issue started when I was on v.1809. I updated, but the issue persisted.

    My display adapter is Intel HD Graphics 520, driver version 23.20.16.4973

    My laptop is a Lenovo ideapad FLEX 4-1470.

    I'm deeply grateful for any help!
      My ComputerSystem Spec

  2. dalchina's Avatar
    Posts : 19,865
    Win 10 Pro (1903)
       #2

    Possibilities:
    Check your graphics driver settings:
    Night light constantly on though it isn't turned on-snap-2019-09-07-20.59.34.png

    - see Control Panel, Intel HD Graphics

    Control Panel, colour management- something amiss with the colour profile

    3rd party program: try a clean boot for comparison
      My ComputersSystem Spec

  3. Bree's Avatar
    Posts : 12,463
    10 Home x64 (1903) (10 Pro on 2nd pc)
       #3

    bokbokwhoosh said: View Post
    My laptop is a Lenovo ideapad FLEX 4-1470.

    Welcome to TenForums bokbokwhoosh

    See if Lenovo Vantage Eye Care Mode is turned on.

    Limiting Exposure to Blue Light | Lenovo US
      My ComputersSystem Spec


  4. Posts : 4
    Windows 10
    Thread Starter
       #4

    Tried Intel HD Graphics - all fine there. Tried different color profiles - didn't help.

    The issue does not arise in safe mode. But I don't have many third party programs running on startup - none that would affect display.
      My ComputerSystem Spec

  5. dalchina's Avatar
    Posts : 19,865
    Win 10 Pro (1903)
       #5

    A clean boot may help to show if it's due to some prog starting up in that case- if it's not a Lenovo utility as @Bree suggested..

    Bear in mind that in Safe mode your graphics driver isn't running. Noted you said
    Once when I uninstalled my graphics driver, the issue went away until I restarted - and the driver reinstalled.
    - which suggests it's related to that, or an adjustment made via that.
      My ComputersSystem Spec


  6. Posts : 4
    Windows 10
    Thread Starter
       #6

    Thanks very much for the input!

    What is a clean boot? How do I do it? (just for future reference)

    The Eye care mode was not on, but I found a setting called 'daytime temperature' which was somehow skewed towards the warm end. I pushed it to the cool end, and it seems to have sorted it for now! I'll report here if the problem returns after restarts.

    Thank you so much, both of you. I was almost getting ready to install linux, or even buy a new laptop!
      My ComputerSystem Spec


  7. Brink's Avatar
    Posts : 42,231
    64-bit Windows 10 Pro for Workstations build 18985
       #7

    Hello @bokbokwhoosh, and welcome to Ten Forums.

    The tutorial below can help show you how to perform a clean boot for troubleshooting this.

    Perform a Clean Boot in Windows 10 to Troubleshoot Software Conflicts
      My ComputersSystem Spec

  8. dalchina's Avatar
    Posts : 19,865
    Win 10 Pro (1903)
       #8

    Glad you found it- where is that setting?

    Also: What is a clean boot?

    This sort of search takes you straight to that tutorial:
    Night light constantly on though it isn't turned on-snap-2019-09-08-06.58.45.png

    Google is great at answering questions like that...
    Night light constantly on though it isn't turned on-snap-2019-09-08-06.56.22.png
      My ComputersSystem Spec


  9. Posts : 4
    Windows 10
    Thread Starter
       #9

    Thanks Bree, Bring, Dalchina! Much appreciated.

    The setting was in the Lenovo Vantage software. Menu>My Device Settings>Display and Camera - 'Daytime Color Temperature'
      My ComputerSystem Spec

  10. dalchina's Avatar
    Posts : 19,865
    Win 10 Pro (1903)
       #10

    Glad you found it.

    Hmm, I have a Lenovo- glad I don't have that 'Vantage... Manufacturers' utilities can sometimes be confusing.
      My ComputersSystem Spec


 
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