Vulkan drops frames when switching the focused window

[awused]

mpv Information

mpv 0.39.0 Copyright © 2000-2024 mpv/MPlayer/mplayer2 projects
libplacebo version: v7.349.0
FFmpeg version: 7.0.2
FFmpeg library versions:
   libavcodec      61.3.100
   libavdevice     61.1.100
   libavfilter     10.1.100
   libavformat     61.1.100
   libavutil       59.8.100
   libswresample   5.1.100
   libswscale      8.1.100

Other Information

- Linux version: Fedora 41
- Kernel Version: 6.11.11
- GPU Model: 4090
- Mesa/GPU Driver Version: 565.77
- Window Manager and Version: i3 version 4.24 (2024-11-06)
- Source of mpv: Fedora repos, also compiled from various git versions
- Latest known working version: n/a
- Issue started after the following happened:

It's been present as long as I can recall. I don't currently have a working Wayland environment to test it.

Reproduction Steps

mpv --no-config --gpu-api=vulkan --gpu-context=x11vk --video-sync=display-desync, using most other --video-sync options seems to work, especially display-resample. --video-out=gpu-next also doesn't seem to have an effect.

While the video is playing, switch the focused window. Just clicking back and forth between some console windows works well enough. The specifics processes or locations of the windows don't seem to matter.

Expected Behavior

Frames shouldn't be dropped.

Actual Behavior

Frames are dropped and video playback visibly hitches when the focused window changes. The Mistimed or Delayed frame counts also increase each time.

Log File

log.txt

Sample Files

No specific videos. Using a motion test pattern makes it obvious.

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.

[llyyr]

Does --wayland-present=yes/--x11-present=yes fix it?

[awused]

No, neither of those seem to impact it. In this screenshot the number of Delayed frames jumps by 2 almost every time I click between two console windows on another monitor.

edit: I assume it's an nvidia thing, and I was mostly just hoping it would go away on its own, but it's been consistent across two different computers, three different GPUs now, any many different software versions now.

I do run picom but disabling picom doesn't change anything. I wasn't able to find any other piece of software that impacted it, and at least among likely nvidia settings I couldn't find one.