Windows 10: With DPI scaling set above 100 percent video does not play at full native resolution.

I am using a 27 inch 4k monitor. To allow comfortable reading of text in applications I have the DPI scaling set to 150%. This works fine except for one small problem. When I display 4k video in a browser at full screen it is scaled to 2560 by 1440. This makes sense when there is some application UI superimposed over the video as that is correctly scaled to 150%. If you just want to watch video it would be really nice for the browser or video decoder to turn off DPI scaling so the video plays in its full native 4k resolution. Now I can go back to the display settings and just set scaling to 100% but then when I stop playing the video I have to change it back again so I can easily read the UI. This is not convenient. There should be an option in the browser or the video decoder to turn off DPI scaling for video especially when it is full screen.

:)

 

Resolution & DPI scaling on 32inch monitor

Samsung LC32F397FWNXZA 32"
resolution 1920 x 1080

graphics card:

GeForce GTX 1050 (2GB)

Maximum Digital Resolution 7680x4320@60Hz2

Would this suggest that it is the monitor that is the limiting factor?

I'd like to just make the apps smaller but unable to scale below 100% or adjust the DPI below the default.

 

Is there a way to force DPI scaling?

The native DPI scaling is already properly set. (Change the size of text, apps, and other items is already properly set to 250%.). Some applications, however, disobey this DPI setting. An application (ChemDraw) that I am using is "nominally" claiming to
be HighDPIAware, when, in fact, the icons are not designed to behave well in high DPI screens (somewhat dishonestly). Is there a way to "force" DPI scaling of an application without changing the resolution of the screen?

 

Dual monitors with different DPI settings do not give correct scaling

An issue with DPI scaling arises when using two different scaling factors. The screen with the lower DPI display is fuzzy/blurred (most easily seen in text).

Hardware and settings

These are the hardware and settings involved:

• 1x primary 3840x2160 27" monitor with DPI scaling set to 150% (because regular text is unreadable at 27").
• 1x secondary 1920x1080 24" monitor with DPI scaling set to 100%, displaying blurry text and images at these settings.

Workarounds

When I use the same DPI scaling on both monitors the display shows correctly. This gives two undesirable workarounds:

• Setting 100% DPI scale on the UHD screen fixes display, but makes text unreadably small on this monitor.
• Setting 150% DPI scale on the HD screen fixes display, but makes text so large I barely have any screen space left on this monitor.

Is there per chance a better solution to this problem? Is this a Windows bug or am I using DPI scaling in the wrong way?

EDIT: Here's the system info from dxdiag just in case.

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System Information

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Time of this report: 11/14/2015, 13:09:59

Machine name: -

Operating System: Windows 10 Pro 64-bit (10.0, Build 10240) (10240.th1_st1.151104-1714)

Language: Dutch (Regional Setting: Dutch)

System Manufacturer: To Be Filled By O.E.M.

System Model: To Be Filled By O.E.M.

BIOS: BIOS Date: 07/09/14 21:30:44 Ver: 04.06.05

Processor: Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz (8 CPUs), ~3.5GHz

Memory: 8192MB RAM

Available OS Memory: 8112MB RAM

Page File: 5936MB used, 3454MB available

Windows Dir: C:\WINDOWS

DirectX Version: 12

DX Setup Parameters: Not found

User DPI Setting: Using System DPI

System DPI Setting: 144 DPI (150 percent)

DWM DPI Scaling: Enabled

Miracast: Available, with HDCP

Microsoft Graphics Hybrid: Not Supported

DxDiag Version: 10.00.10240.16384 64bit Unicode