Windows 10: custom scaling level not initializing sometimes

I'm running a 4K display at 3840x2160 so I've set my custom scaling level to 150%. Once in a while when I wake the system up and unlock my session the icons are shrunk (probably down to 100%). If I log out and log in again I'm back to normal. I notice the settings dialog warns that setting a custom scaling level is "not recommended". What am I supposed to do instead?

some relevant system info:
GeForce GTX 960
Asus PB297Q 4K display

:)

 

Change the size of text only in Windows 10?

Thank R0bb0,

But you must set to manuel this option : "set a level for making
the custom scale"

After this you can set the custom scaling level to 100%.

Now you can addjust the text size

Regards

 

Windows 10 pro 125% display blur

I've managed to get sharp big fonts in CMD, Device Manager, etc at once using standard Windows settings UI (i.e., without changing the compatibility settings or using the auto-start registry script or 3rd party apps).

Basically, you need to go to the Control Panel > Appearance and Personalization > Display and set a
custom scaling level to 125%.

The nuance is that the UI won't let you to apply the setting if you already have the recommended 125% setting in the Settings > Display. But there are at least two workarounds:

Workaround 1: You can just set the scaling level to some other value in the Settings > Display UI, just before changing the settings back to 125% in the custom scaling level UI.

Workaround 2: You can set the custom scaling level to some other value in the custom scaling level UI, Apply, choose to re-logon later in the popped dialog, then set the custom scaling level back to 125%, Apply, and re-logon manually.

I've tested both workarounds and they both worked on two of my laptops.

 

Ah, my display driver is way out of date. I disabled Java, and that in turn disables NVidia Experience, so I wasn't getting the normal updates. I will post again if the problem persists, but I would think this will fix it. My old driver was version 364.something.