Win10 Won't Output NATIVE 1366x768 To HDTV (Win7 Does) - Fix?

[rcxtra]

Can't get Windows 10 to output native1366x768 resolution to HDTV, instead it software scales 1080p down to the lower res which looks horrible -- Windows 7 does not have this problem (i.e. Win display setting 1920x1080 -> TV 1080p, Win display setting 1366x768 -> TV native 1366)

I have a Samsung HDTV which supports both 1080p and a native 1366x768 input mode. When browsing from the couch I prefer 1366x768 @125% DPI, it's easier to read and just plain looks better than 1080p @150% DPI. With Win7 the TV will actually switch its input mode to the native 1366x768 automatically when I change the display resolution in Windows. Not so with Win10, regardless of the display res set in Win10 the GPU always outputs a 1080p signal and the lower resolutions are software scaled down (looks horrible).

So far I have been unable to find a fix for this in Win10. I did come across an article which explained how Win10 changed DPI scaling to accommodate the fact that phones and tablets can turn sideways. The article also pointed to a REG hack to put the scaling back to the way Win8 does it with a program called Windows10_DPI_FIX, unfortunately that didn't solve the problem.

I have two PC's that I've tried, one w/Nvidia GPU and the other w/AMD:
PC1
R9 270X GPU
Asus P8B75-M/CSM MB
i5-3570
16G RAM

PC2
GTX 650 GPU
MSI B75MA-E33 MB
i3-3220
8G RAM

I'm reasonably certain it's a Win10 driver issue. When I upgraded PC2 from Win7 to Win10 the TV was still using its native 1366x768 mode before I manually updated to the latest Nvidia Win10 driver. I've since performed clean Win10 installs on both PC's and the TV will not change input mode like it does w/Win7 -- seems like Win10 always wants to output the display's highest resolution (HDTV 1080p in this case) and software downscale to the lower 1366x768 res.

Any ideas on how/where to find a fix for this. If I can't fix this I'm going to have to roll back to Win7

 

[Shaun o]

Far as aware that resolution is only present if you use a Dvi-i type cable to a 15pin vga type connector if your tv has a 15 pin vga input on it.

If you use a hdmi cable from both graphics cards to hdmi on the tv then 1080p is always native to a hdmi connection.

If the resolution is available, then right clicking on the desktop, selecting screen resolution.

Advanced settings.
And clicking the list all modes tab should give you the 1366x768 as a setting.


I take it you have looked at the panel display options settings in both the Nvidia, and ATI control panels.

And the over scan settings.

For the Amd card turn off virtual super resolution and gpu scaling.

 

[rcxtra]

I tried all of that already. In fact, I went through the drivers for both AMD and Nvidia and made sure all option were the same between Win7/Win10. Also 1366x768 is a valid selection even with HDMI connection.

As I pointed out, this works w/Win7 but not w/Win10 and I haven't been able to find a fix anywhere yet. I thought the Windows10_DPI_FIX hack would solve the problem when I found it, but it didn't. Win10 is doing something different with the drivers but I just can't figure a work-around.