Video won't show with waylandvk, segfaults with x11vk

[DemonicSavage]

mpv Information

mpv v0.38.0 Copyright © 2000-2024 mpv/MPlayer/mplayer2 projects
 built on Apr 18 2024 06:31:17
libplacebo version: v6.338.2
FFmpeg version: n6.1.1
FFmpeg library versions:
   libavutil       58.29.100
   libavcodec      60.31.102
   libavformat     60.16.100
   libswscale      7.5.100
   libavfilter     9.12.100
   libswresample   4.12.100

Other Information

• Linux version: Arch Linux
• Kernel Version: 6.9.1-zen1-1-zen
• GPU Model: RX 7800 XT
• Mesa/GPU Driver Version: Mesa 24.0.7-arch1.3
• Window Manager and Version: KWin 6.0.4.1-1
• Source mpv: Arch repos
• Introduced in version:

Reproduction Steps

mpv --no-config --vo=gpu-next --gpu-context=x11vk [FILE]
mpv --no-config --vo=gpu-next --gpu-context=waylandvk [FILE]

Expected Behavior

File plays normally

Actual Behavior

With x11vk, there is a segfault. With waylandvk, the file plays, but shows no video (or even the mpv window)

Log File

Wayland: https://pastebin.com/rPC9VhH6
X11: https://pastebin.com/QwqZUATf

X11 segfault backtrace: https://pastebin.com/k2ipvy7r

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.

[DemonicSavage]

An update: After a reboot, waylandvk also segfaults.
New logs: https://pastebin.com/yx16r835
Backtrace: https://pastebin.com/WtCcRS5f

[llyyr]

The segfaults are in /usr/lib/libshaderc_shared.so.1, seems like a broken system. You also don't have debug symbols for shaderc so hard to say anything concrete

[DemonicSavage]

It does seem libshaderc was the culprit - apparently I was using a weird AUR version of it. Using the official shaderc from the [extra] repo made it work.