[Windows] No hdmi sound in Fullscreen mode with "gl" video drivers when hdr is activated in windows

[mickagame]

Description

When hdr is activated in windows panel i don't have sound through hdmi with any sound drivers with "gl" video drivers.
With audio speaker output i don't have this problem.

Expected behavior

With "gl" core i expect sound in any mode (window, windowed fullscreen, true fullscreen) when hdr is enabled in windows.
For example : with mednafen (open gl emulator) i have sound through hdmi even if hdr is enabled.

Actual behavior

hdr disabled in windows : audio work perfectly in any mode (window, windowed fullscreen, true fullscreen)

hdr enabled in windows :

• gl video driver / true fullscreen : KO (no audio with all audio core)
• gl video driver / windowed fullscreen : KO (no audio with all audio core)
• d3d12 video driver / true fullscreen : KO (no audio with all audio core)
• d3d12 video driver / windowed fullscreen : OK audio work perfectly

retroarch_hdr_desactivated.log
retroarch_hdr_activated.log

Steps to reproduce the bug

1. Launch Retroarch in fullscreen mode (windowed or true fullscreen)
2. Launch a genesis game with genesis plus gx core

Bisect Results

The game launch and there is no sound

Version/Commit

• RetroArch: 1.9.13 (but reproduced on all version since 1.9.10)

Environment information

• OS: Windows 11
• Hardware : Intel NUC8i7BEH with sound through hdmi

[mirh]

27.20.100.8681 sounds like a pretty old driver.
https://community.intel.com/t5/Intel-NUCs/NUC7i5BNH-No-audio-through-HDMI-TV-in-fullscreen-for-certain/td-p/536176
https://old.reddit.com/r/intelnuc/comments/b0d377/no_audio_over_hdmi_when_fullscreen_with_iris/
Guy here claims that it may have something to do with some kind of delay causing the application to drop audio. Does the windows mixer report sounds being outputted at least?