G-Sync does not engage on LG G4 OLED TV

[GoldenSW]

mpv Information

mpv v0.39.0-502-ge52f9758 Copyright © 2000-2024 mpv/MPlayer/mplayer2 projects
 built on Dec 14 2024 00:11:14
libplacebo version: v7.350.0 (v7.349.0-30-g056b852-dirty)
FFmpeg version: N-118073-g715a35dad
FFmpeg library versions:
   libavcodec      61.27.101
   libavdevice     61.4.100
   libavfilter     10.6.101
   libavformat     61.9.101
   libavutil       59.51.100
   libswresample   5.4.100
   libswscale      8.12.100

Other Information

- Windows version: Microsoft Windows [Version 10.0.26100.2605]
- GPU model, driver and version: RTX 2080, driver 566.14
- Source of mpv: https://github.com/shinchiro/mpv-winbuild-cmake/releases
- Latest known working version: None
- Issue started after the following happened: -

Reproduction Steps

When using mpv, VRR does not engage on my LG G4 OLED TV. The TV is officialy certified by NVIDIA to be G-Sync compatible and it works as intended in all windows games, regardless of API. However, wtihout changing any settings, with the same OS and hardware, it works flawlessly on another display I own, the DELL S2719DGF which has FreeSync via displayport but I enabled it as G-Sync in the NVIDIA control panel.

Here's what I tried so far:

1. Multiple vo, hwdec, gpu-api and gpu-context configs.
2. video-sync=audio
3. Disabled V-Sync.
4. Made sure G-Sync is enabled for fullscreen and windowed. Also checked mpv's NVIDIA profile to allow G-Sync.
5. Updated TV firmware.
6. A script someone suggested to double the fps of video content below 30 vf=lavfi=[fps=fps='if(gt(source_fps,30),source_fps,source_fps*2)']

Expected Behavior

G-Sync engaging properly for video playback

Actual Behavior

G-Sync never engages

Log File

output.txt

Sample Files

No response

I carefully read all instruction and confirm that I did the following:

• I tested with the latest mpv version to validate that the issue is not already fixed.
• I provided all required information including system and mpv version.
• I produced the log file with the exact same set of files, parameters, and conditions used in "Reproduction Steps", with the addition of --log-file=output.txt.
• I produced the log file while the behaviors described in "Actual Behavior" were actively observed.
• I attached the full, untruncated log file.
• I attached the backtrace in the case of a crash.

[ValeZAA]

You need to enable G-sync for mpv.exe un Nvidia control panel.