[Bug]: H.264 encoding in Chrome has broken colours on LNL

[retrixe]

Which component impacted?

Encode

Is it regression? Good in old configuration?

None

What happened?

1. Open Chrome using the flags google-chrome --enable-features=AcceleratedVideoEncoder
2. Visit https://codec-compare.glitch.me/ on a Lunar Lake system
3. Observe that the H.264 options are broken whereas the AV1 function works correctly

I'm unable to repro this issue on my Tiger Lake system with i915/Xe DRM and the same software versions.

What's the usage scenario when you are seeing the problem?

Web browser, Video Conference, Content Creation, Game Streaming

What impacted?

I stream my display and webcam using Google Chrome in various video conferencing and chat platforms, and since upgrading to Lunar Lake, this means I'm unable to use hardware acceleration. Encoding seems to work fine in OBS Studio, it's only Chrome which is affected.

Debug Information

• Fedora Workstation 41 with kernel 6.12.5 and 6.13-rc3
• libva/libva-utils 2.22.0 + gmmlib 22.5.5 + media-driver 24.3.4
• Chrome Dev 133.0.6888.2 (repro'ed on Chrome Stable 131.0.6778.139 as well)
• dmesg - No relevant logs
• lspci -nn |grep -Ei 'VGA|DISPLAY'
00:02.0 VGA compatible controller [0300]: Intel Corporation Lunar Lake [Intel Arc Graphics 130V / 140V] [8086:64a0] (rev 04)

vainfo log

Trying display: wayland
libva info: VA-API version 1.22.0
libva info: Trying to open /usr/lib64/dri-nonfree/iHD_drv_video.so
libva info: Found init function __vaDriverInit_1_22
libva info: va_openDriver() returns 0
vainfo: VA-API version: 1.22 (libva 2.22.0)
vainfo: Driver version: Intel iHD driver for Intel(R) Gen Graphics - 24.3.4 ()
vainfo: Supported profile and entrypoints
      VAProfileNone                   :	VAEntrypointVideoProc
      VAProfileMPEG2Simple            :	VAEntrypointVLD
      VAProfileMPEG2Main              :	VAEntrypointVLD
      VAProfileH264Main               :	VAEntrypointVLD
      VAProfileH264Main               :	VAEntrypointEncSlice
      VAProfileH264High               :	VAEntrypointVLD
      VAProfileH264High               :	VAEntrypointEncSlice
      VAProfileJPEGBaseline           :	VAEntrypointVLD
      VAProfileJPEGBaseline           :	VAEntrypointEncPicture
      VAProfileH264ConstrainedBaseline:	VAEntrypointVLD
      VAProfileH264ConstrainedBaseline:	VAEntrypointEncSlice
      VAProfileVP8Version0_3          :	VAEntrypointVLD
      VAProfileHEVCMain               :	VAEntrypointVLD
      VAProfileHEVCMain               :	VAEntrypointEncSlice
      VAProfileHEVCMain10             :	VAEntrypointVLD
      VAProfileHEVCMain10             :	VAEntrypointEncSlice
      VAProfileVP9Profile0            :	VAEntrypointVLD
      VAProfileVP9Profile1            :	VAEntrypointVLD
      VAProfileVP9Profile2            :	VAEntrypointVLD
      VAProfileVP9Profile3            :	VAEntrypointVLD
      VAProfileHEVCMain12             :	VAEntrypointVLD
      VAProfileHEVCMain422_10         :	VAEntrypointVLD
      VAProfileHEVCMain422_10         :	VAEntrypointEncSlice
      VAProfileHEVCMain422_12         :	VAEntrypointVLD
      VAProfileHEVCMain444            :	VAEntrypointVLD
      VAProfileHEVCMain444            :	VAEntrypointEncSlice
      VAProfileHEVCMain444_10         :	VAEntrypointVLD
      VAProfileHEVCMain444_10         :	VAEntrypointEncSlice
      VAProfileHEVCMain444_12         :	VAEntrypointVLD
      VAProfileHEVCSccMain            :	VAEntrypointVLD
      VAProfileHEVCSccMain            :	VAEntrypointEncSlice
      VAProfileHEVCSccMain10          :	VAEntrypointVLD
      VAProfileHEVCSccMain10          :	VAEntrypointEncSlice
      VAProfileHEVCSccMain444         :	VAEntrypointVLD
      VAProfileHEVCSccMain444         :	VAEntrypointEncSlice
      VAProfileAV1Profile0            :	VAEntrypointVLD
      VAProfileAV1Profile0            :	VAEntrypointEncSlice
      VAProfileHEVCSccMain444_10      :	VAEntrypointVLD
      VAProfileHEVCSccMain444_10      :	VAEntrypointEncSlice
      VAProfileVVCMain10              :	VAEntrypointVLD
      VAProfileVVCMultilayerMain10    :	VAEntrypointVLD

libva traces generated when following the repro steps attached:
libva_trace.log.112828.thd-0x000040c1.txt
libva_trace.log.112848.thd-0x000042de.txt

Do you want to contribute a patch to fix the issue?

None