If you’re noticing blue artifacts or green/Blue squiggly lines on Secondary monitor after updating to Windows 10 May 2020 update, you should update F.lux to version 4.115 immediately to get a reprieve.The update also introduces a new setting in Effects sub-menu to enable Windows 10 dark mode at night and disable during the day.
There have been reports on F.lux forum [1] [2] from users running Windows 10 version 2004 that they’re seeing artifacts on secondary display when playing games or watching videos.
The wallpaper above has quite a few artifact on my second monitor, mostly around darker areas.
My second monitor displays artifacts no matter which port i use to connect it to my PC (tried dport and hdmi) or even which adapter (tried both integrated Intel HD graphics and Nvidia 970).
Another user running shares a screenshot of blue/green squiggly lines appearing on secondary screen. He confirms Primary monitor is not affected
Affected users found the following workarounds working
- Turning night mode on and off in Windows 10 2004
- Disconnecting and connecting HDMI cord
- Disabling and uninstalling F.lux
Thankfully, you don’t need to update F.lux if you”re using it on Windows 10 2004 and affected, F.lux will auto update itself to latest version according to the developer.
The debate about whether you should use F.lux or Nightly mode on Windows 10 continues. This is a never ending topic.
The latest version of F.lux adds a new feature that turns on dark mode at night and turns off dark mode on day on Windows 10. To try this.
- Click on F.lux icon in the notification area
- Click on menu > Effects and Extra colors
- Select ‘Use Dark mode at sunset’
F.lux introduces Solar time. You’ll find more info about it in the changelog below.
What’s new with f.lux
version 4.115 (beta)
- Try this: “Effects…” “Use Dark mode at sunset” to turn Windows Dark mode on at night and off during the day
- DST smoothing (cues to make the time change easier)
- Fixes for Hue reliability
- Solar time
- Fixes for Windows 10 May 2020 (v2004)
Solar Time?
We added “Solar time” to the preferences, because we’re think it’s important.
If your solar time is after the current clock time, it’s likely that you live in a place that’s easy for night owls to be (because they can wake up late). And if you’re in a place where the solar time is much earlier than what your clock says, it’s easier for early birds, because they can go to bed early.
This is not the first time F.lux has issues with Windows 10 feature updates, in the past, the compatibility issue between Windows 10 1903 and F.lux caused to screenshots to appear with yellow tint. The issue has been addressed and fixed by developer then.
Related articles:
Windows 10 1903 Cumulative Update KB4501375 fixes F.lux, Night Light and Event Viewer Issues
F.lux 4.84 adds grayscale mode for distraction-free reading
F.lux Tinted Screenshots bug in Windows 10 version 1903
