libva error: vaGetDriverNames() failed with unknown libva error

[SiewwenL]

Hi, I am encountering this issue when running the cpp decode_resize_inference

Steps to reproduce the issue:

1. DLStreamer setup - https://dlstreamer.github.io/dev_guide/advanced_install/advanced_install_guide_compilation.html
2. ./intel64/Release/bin/ffmpeg_openvino_decode_resize_inference -i /home/ubuntu22/person-bicycle-car-detection.mp4 -m /home/ubuntu22/intel/face-detection-adas-0001/FP16/face-detection-adas-0001.xml
   https://github.com/open-edge-platform/edge-ai-libraries/tree/main/libraries/dl-streamer/samples/ffmpeg_openvino/cpp/decode_resize_inference

Here is my vainfo output:
Trying display: wayland
Trying display: x11
libva info: VA-API version 1.22.0
libva error: vaGetDriverNames() failed with unknown libva error
libva info: User environment variable requested driver 'iHD'
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/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 - 25.2.1 ()
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
VAProfileVP9Profile0 : VAEntrypointEncSlice
VAProfileVP9Profile1 : VAEntrypointVLD
VAProfileVP9Profile1 : VAEntrypointEncSlice
VAProfileVP9Profile2 : VAEntrypointVLD
VAProfileVP9Profile2 : VAEntrypointEncSlice
VAProfileVP9Profile3 : VAEntrypointVLD
VAProfileVP9Profile3 : VAEntrypointEncSlice
VAProfileHEVCMain12 : VAEntrypointVLD
VAProfileHEVCMain422_10 : VAEntrypointVLD
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

OS: ubuntu22.04

[brmarkus]

Which hardware are you running on?
Instead of wayland and x11 you might have a DRM environment? Do you have a system with a monitor connected and you are using the monitor, or are you using a screen-forwarding/remote-screen-sharing session?

[SiewwenL]

Hardware: Intel(R) Core(TM) Ultra 7 165HL

Yes I tried on both with monitor connected and ssh but the issue still persists

[brmarkus]

Where you able to use the system and this SW image successfully earlier? Has something changed?
Are you sure your user has the correct access rights and is part of the correct groups?

Do you have other ENV variables set?
Can you check a few patterns like

env | grep -i drm
env | grep -i dri
env | grep -i vaapi

Do you have multiple versions of libva and backend installed (because the log mentions a user specific ENV variable is used to select the iHD backend)?
Can you find multiple "iHD_drv_video.so" in your system?

The version of the backend iHD looks too new for the libva "frontend":

libva info: VA-API version 1.22.0 <= libva frontend version
libva error: vaGetDriverNames() failed with unknown libva error
libva info: User environment variable requested driver 'iHD'
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so
libva info: Found init function __vaDriverInit_1_22 <= libva frontend version
libva info: va_openDriver() returns 0
vainfo: VA-API version: 1.22 (libva 2.22.0) <= that is the libva "backend" media driver version, I would expect something like "2.12.0"
vainfo: Driver version: Intel iHD driver for Intel(R) Gen Graphics - 25.2.1 () <= I would expect something like "24.1.0"

Do you know, is this a specific variant of the media-driver libva backend with specific features for this platform?

You could enable verbose tracing and logging with additonal env variables like

export LIBVA_TRACE=/path/to/file
export LIBVA_MESSAGING_LEVEL=1 (or even iusing 2)

[brmarkus]

@SiewwenL are you still impacted by the issue? Have you tried to capture libva traces? Were you able to test with other, older versions?