Vulkan not working after PR #5056 got merged

[inkatail]

Is there an existing issue for this?

• I have searched the existing issues

Is your issue described in the documentation?

• I have read the documentation

Is your issue present in the latest beta/pre-release?

This issue is present in the latest pre-release

Describe the Bug

The Vulkan encoder stopped working for me after I updated to the latest sunshine-git from AUR. When I reverted the PR #5056 myself, it suddenly started working again.
Errors in logs show Driver does not support required encode feedback flags (BUFFER_OFFSET and BYTES_WRITTEN).

Expected Behavior

The encoder should be working and detected just fine

Additional Context

No response

Host Operating System

Linux

Operating System Version

CachyOS 7.0.3-1-cachyos

Architecture

amd64/x86_64

Package

Linux - AUR (Third Party)

GPU Type

AMD

GPU Model

RX 6600

GPU Driver/Mesa Version

26.0.6-2

Capture Method

KMS (Linux)

Apps

Log output

[2026-05-05 13:28:53.487]: Info: Sunshine version: 2026.428.130031.r1.ga90d306 commit: a90d3068e91ca62ff35196971279e89d8e5d9da0
[2026-05-05 13:28:53.487]: Info: Package Publisher: AUR
[2026-05-05 13:28:53.487]: Info: Publisher Website: https://aur.archlinux.org/packages/sunshine-git
[2026-05-05 13:28:53.487]: Info: Get support: https://aur.archlinux.org/packages/sunshine-git
[2026-05-05 13:28:53.487]: Info: config: 'encoder' = vulkan
[2026-05-05 13:28:53.487]: Info: config: 'fec_percentage' = 10
[2026-05-05 13:28:53.487]: Info: config: 'vk_rc_mode' = 2
[2026-05-05 13:28:53.487]: Info: config: 'wan_encryption_mode' = 0
[2026-05-05 13:28:53.488]: Info: [wayland] Found display [wayland-0]
[2026-05-05 13:28:53.488]: Info: [wayland] Found interface: zxdg_output_manager_v1(31) version 3
[2026-05-05 13:28:53.488]: Info: [wayland] Found interface: zwp_linux_dmabuf_v1(57) version 5
[2026-05-05 13:28:53.488]: Info: [wayland] Found interface: wl_output(64) version 4
[2026-05-05 13:28:53.488]: Warning: [wlgrab] Missing Wayland wire for wlr-export-dmabuf
[2026-05-05 13:28:53.489]: Info: /dev/dri/card1 -> amdgpu
[2026-05-05 13:28:53.489]: Info: [wayland] Found display [wayland-0]
[2026-05-05 13:28:53.489]: Info: [wayland] Found display [wayland-0]
[2026-05-05 13:28:53.489]: Info: [wayland] Found interface: zxdg_output_manager_v1(31) version 3
[2026-05-05 13:28:53.489]: Info: [wayland] Found interface: zwp_linux_dmabuf_v1(57) version 5
[2026-05-05 13:28:53.489]: Info: [wayland] Found interface: wl_output(64) version 4
[2026-05-05 13:28:53.489]: Info: [wayland] Resolution: 1920x1080
[2026-05-05 13:28:53.489]: Info: [wayland] Offset: 0x0
[2026-05-05 13:28:53.489]: Info: [wayland] Logical size: 1920x1080
[2026-05-05 13:28:53.489]: Info: [wayland] Name: HDMI-A-1
[2026-05-05 13:28:53.489]: Info: [wayland] Found monitor: Xiaomi Corporation P27FBA-RAGL
[2026-05-05 13:28:53.489]: Info: -------- Start of KMS monitor list --------
[2026-05-05 13:28:53.489]: Info: Monitor 0 is HDMI-A-1: Xiaomi Corporation P27FBA-RAGL
[2026-05-05 13:28:53.489]: Info: --------- End of KMS monitor list ---------
[2026-05-05 13:28:53.490]: Info: [portalgrab] Loaded portal restore token from disk
[2026-05-05 13:28:53.563]: Info: Trying encoder [vulkan]
[2026-05-05 13:28:53.563]: Info: Screencasting with KMS
[2026-05-05 13:28:53.563]: Info: /dev/dri/card1 -> amdgpu
[2026-05-05 13:28:53.563]: Info: Found monitor for DRM screencasting
[2026-05-05 13:28:53.563]: Info: Found connector ID [459]
[2026-05-05 13:28:53.564]: Info: Found cursor plane [414]
[2026-05-05 13:28:53.564]: Info: Creating encoder [h264_vulkan]
[2026-05-05 13:28:53.564]: Info: Color coding: SDR (Rec. 601)
[2026-05-05 13:28:53.564]: Info: Color depth: 8-bit
[2026-05-05 13:28:53.564]: Info: Color range: JPEG
[2026-05-05 13:28:53.594]: Info: Streaming bitrate is 1000000
[2026-05-05 13:28:53.594]: Error: [h264_vulkan @ 0x5575928114c0] Driver does not support required encode feedback flags (BUFFER_OFFSET and BYTES_WRITTEN).
[2026-05-05 13:28:53.598]: Error: Could not open codec [h264_vulkan]: Operation not supported
[2026-05-05 13:28:53.598]: Info: Creating encoder [h264_vulkan]
[2026-05-05 13:28:53.598]: Info: Color coding: SDR (Rec. 601)
[2026-05-05 13:28:53.598]: Info: Color depth: 8-bit
[2026-05-05 13:28:53.598]: Info: Color range: JPEG
[2026-05-05 13:28:53.608]: Info: Streaming bitrate is 1000000
[2026-05-05 13:28:53.608]: Error: [h264_vulkan @ 0x5575928114c0] Driver does not support required encode feedback flags (BUFFER_OFFSET and BYTES_WRITTEN).
[2026-05-05 13:28:53.609]: Error: Could not open codec [h264_vulkan]: Operation not supported
[2026-05-05 13:28:53.609]: Info: Encoder [vulkan] failed
[2026-05-05 13:28:53.609]: Error: Couldn't find any working encoder matching [vulkan]
[2026-05-05 13:28:53.609]: Info: // Testing for available encoders, this may generate errors. You can safely ignore those errors. //
[2026-05-05 13:28:53.609]: Info: Trying encoder [nvenc]
[2026-05-05 13:28:53.609]: Info: Screencasting with KMS
[2026-05-05 13:28:53.610]: Info: /dev/dri/card1 -> amdgpu
[2026-05-05 13:28:53.610]: Error: Couldn't find monitor [0]
[2026-05-05 13:28:53.610]: Info: /dev/dri/card1 -> amdgpu
[2026-05-05 13:28:53.610]: Error: Couldn't find monitor [0]
[2026-05-05 13:28:53.810]: Info: Screencasting with KMS
[2026-05-05 13:28:53.810]: Info: /dev/dri/card1 -> amdgpu
[2026-05-05 13:28:53.811]: Error: Couldn't find monitor [0]
[2026-05-05 13:28:53.811]: Info: /dev/dri/card1 -> amdgpu
[2026-05-05 13:28:53.811]: Error: Couldn't find monitor [0]
[2026-05-05 13:28:54.011]: Info: Encoder [nvenc] failed
[2026-05-05 13:28:54.011]: Info: Trying encoder [vaapi]
[2026-05-05 13:28:54.011]: Info: Screencasting with KMS
[2026-05-05 13:28:54.011]: Info: /dev/dri/card1 -> amdgpu
[2026-05-05 13:28:54.011]: Info: Found monitor for DRM screencasting
[2026-05-05 13:28:54.011]: Info: Found connector ID [459]
[2026-05-05 13:28:54.011]: Info: Found cursor plane [414]
[2026-05-05 13:28:54.041]: Info: Creating encoder [h264_vaapi]
[2026-05-05 13:28:54.041]: Info: Color coding: SDR (Rec. 601)
[2026-05-05 13:28:54.041]: Info: Color depth: 8-bit
[2026-05-05 13:28:54.041]: Info: Color range: JPEG
[2026-05-05 13:28:54.050]: Info: EGL: context priority set to HIGH
[2026-05-05 13:28:54.055]: Info: vaapi vendor: Mesa Gallium driver 26.0.6-arch2.2 for AMD Radeon RX 6600 (radeonsi, navi23, ACO, DRM 3.64, 7.0.3-1-cachyos)
[2026-05-05 13:28:54.056]: Info: Streaming bitrate is 1000000
[2026-05-05 13:28:54.056]: Info: Using normal encoding mode
[2026-05-05 13:28:54.056]: Info: Using default rate control
[2026-05-05 13:28:54.306]: Info: Creating encoder [hevc_vaapi]
[2026-05-05 13:28:54.306]: Info: Color coding: SDR (Rec. 601)
[2026-05-05 13:28:54.306]: Info: Color depth: 8-bit
[2026-05-05 13:28:54.306]: Info: Color range: JPEG
[2026-05-05 13:28:54.314]: Info: EGL: context priority set to HIGH
[2026-05-05 13:28:54.319]: Info: vaapi vendor: Mesa Gallium driver 26.0.6-arch2.2 for AMD Radeon RX 6600 (radeonsi, navi23, ACO, DRM 3.64, 7.0.3-1-cachyos)
[2026-05-05 13:28:54.319]: Info: Streaming bitrate is 1000000
[2026-05-05 13:28:54.319]: Info: Using normal encoding mode
[2026-05-05 13:28:54.319]: Info: Using default rate control
[2026-05-05 13:28:54.336]: Info: Creating encoder [av1_vaapi]
[2026-05-05 13:28:54.336]: Info: Color coding: SDR (Rec. 601)
[2026-05-05 13:28:54.336]: Info: Color depth: 8-bit
[2026-05-05 13:28:54.336]: Info: Color range: JPEG
[2026-05-05 13:28:54.344]: Info: EGL: context priority set to HIGH
[2026-05-05 13:28:54.348]: Info: vaapi vendor: Mesa Gallium driver 26.0.6-arch2.2 for AMD Radeon RX 6600 (radeonsi, navi23, ACO, DRM 3.64, 7.0.3-1-cachyos)
[2026-05-05 13:28:54.349]: Info: Streaming bitrate is 1000000
[2026-05-05 13:28:54.349]: Error: [av1_vaapi @ 0x5575928114c0] No usable encoding entrypoint found for profile VAProfileAV1Profile0 (32).
[2026-05-05 13:28:54.349]: Error: Could not open codec [av1_vaapi]: Function not implemented
[2026-05-05 13:28:54.351]: Info: Screencasting with KMS
[2026-05-05 13:28:54.351]: Info: /dev/dri/card1 -> amdgpu
[2026-05-05 13:28:54.351]: Info: Found monitor for DRM screencasting
[2026-05-05 13:28:54.351]: Info: Found connector ID [459]
[2026-05-05 13:28:54.351]: Info: Found cursor plane [414]
[2026-05-05 13:28:54.357]: Info: Creating encoder [hevc_vaapi]
[2026-05-05 13:28:54.357]: Info: Color coding: SDR (Rec. 709)
[2026-05-05 13:28:54.357]: Info: Color depth: 10-bit
[2026-05-05 13:28:54.357]: Info: Color range: JPEG
[2026-05-05 13:28:54.365]: Info: EGL: context priority set to HIGH
[2026-05-05 13:28:54.370]: Info: vaapi vendor: Mesa Gallium driver 26.0.6-arch2.2 for AMD Radeon RX 6600 (radeonsi, navi23, ACO, DRM 3.64, 7.0.3-1-cachyos)
[2026-05-05 13:28:54.372]: Info: Streaming bitrate is 1000000
[2026-05-05 13:28:54.372]: Info: Using normal encoding mode
[2026-05-05 13:28:54.372]: Info: Using default rate control
[2026-05-05 13:28:54.389]: Info: 
[2026-05-05 13:28:54.389]: Info: // Ignore any errors mentioned above, they are not relevant. //
[2026-05-05 13:28:54.389]: Info: 
[2026-05-05 13:28:54.389]: Info: Found H.264 encoder: h264_vaapi [vaapi]
[2026-05-05 13:28:54.389]: Info: Found HEVC encoder: hevc_vaapi [vaapi]
[2026-05-05 13:28:54.389]: Info: Starting system tray
[2026-05-05 13:28:54.391]: Info: Configuration UI available at [https://localhost:47990]
[2026-05-05 13:28:54.391]: Info: Adding avahi service inka102
[2026-05-05 13:28:54.711]: Info: System tray created
[2026-05-05 13:28:54.711]: Info: Starting main loop
[2026-05-05 13:28:55.350]: Info: Avahi service inka102 successfully established.

Online logs

No response

[ReenigneArcher]

Likely needs LizardByte/build-deps#669 which is not in Sunshine yet.

[hanneshoch3]

For a quick and dirty fix for AUR/PKGBUILD:

prepare() {
  cd "$_pkgsrc"
  git submodule update --recursive --init --depth 1

  # Sunshine downloads pre-built FFmpeg from build-deps GitHub releases.
  # Latest release (v2026.425.130933) includes a buggy FFmpeg Vulkan encoder:
  #   https://github.com/LizardByte/build-deps/pull/669
  # The fix is in the source patch, but Sunshine uses pre-built binaries, so
  # we must pin to the last release before the regression until LizardByte
  # publishes a new release with the fix.
  git -C third-party/build-deps fetch --tags
  git -C third-party/build-deps checkout v2026.323.141148

[shelterx]

Hmm.. I tried the above but it still only finds the vaapi encoder even if I force Vulkan
I tried both autodetedct and XDG Portal as capture method.

EDIT:
Ah, the Arch AUR sets cap_sys_admin,cap_sys_nice=p on the sunshine binary, you have to remove those, then it works.

[fonseca9001]

Confirming this issue affects more than just AUR builds. Hitting the same BUFFER_OFFSET and BYTES_WRITTEN failure on the official lizardbyte-beta pacman repo, on different hardware (RX 9070 XT, RDNA 4 / gfx1201) than the original report.

Sunshine: 2026.507.123453 (commit bfae5de) from lizardbyte-beta
GPU: AMD Radeon RX 9070 XT
Mesa: 26.1.0-arch2.1 (RADV)
Kernel: 7.0.4-2-cachyos
Distro: CachyOS
Compositor: Wayland

Sunshine falls back to VAAPI cleanly (h264/hevc/av1 all initialize), so streaming works, but Vulkan encode is unreachable.
Note that the underlying FFmpeg ordering bug appears to be fixed by LizardByte/build-deps#669 (merged April 29), but Sunshine's third-party/build-deps submodule is still pinned at cd7d45a from PR #5056, so the fix isn't reaching users yet. A dependabot bump past cd7d45a should resolve this for everyone affected.

Relevant log excerpt:

[h264_vulkan @ ...] Driver does not support required encode feedback flags (BUFFER_OFFSET and BYTES_WRITTEN).
Could not open codec [h264_vulkan]: Operation not supported
Encoder [vulkan] failed

[Kishi85]

@ReenigneArcher Could LizardByte/build-deps get bumped/a new release to fix this issue? I know vaapi fallback is automatic for most people (unless you do encoder=vulkan) but it would be nice to just have this fixed without having to force an older tag of build-deps for using/testing sunshine with vulkan encoding.

[Kishi85]

Thank you @ReenigneArcher !