Windows HDR and certain video drivers: gl / glcore / vulkan

[livid]

I am not sure if this is a known issue, but a search for "Windows HDR" returns no open issues, so I open it here.

Description

When using certain video drivers like gl, glcore, and vulkan, if Windows HD Color is enabled, after quitting RetroArch, the whole Windows desktop would become very dim.

But d3d11 does not have such a problem.

Expected behavior

Windows desktop color display should not be affected after quitting RetroArch using gl, glcore, or vulkan.

Actual behavior

Windows desktop color display becomes dim after quitting RetroArch.

Version/Commit

• RetroArch: 1.9.0

Environment information

• OS: Windows 10 Pro 19042
• GPU: RTX Titan with 460.89 driver

[freecodecampster]

I've found that to stop HDR turning off and for shaders to still work under Windows 10 I have to change video to d3d11 in these two places: Drivers>video>d3d11 Video>output>video>d3d11

GPU: RTX 3070 with 461.92 driver

[livid]

Switching the video driver to d3d11 does make this HDR issue went away, but it introduces another problem. Arcade core FBNeo would no longer properly output titles that need a vertical display. See attached.

That issue is #7660

[kanjieater]

I'm experiencing this now as well. HDR fails to show an option for Vulkan but is fine for d3d11