Hardware acceleration does not work on Linux with the Intel(R) Media Driver for VAAPI (iHD)

Describe the bug
Moonlight is unable to use hardware acceleration when the Intel Media Driver (will be referred to as iHD driver moving forward) is set. It warns me that no functioning hardware accelerated video decoder was detected by Moonlight.

Steps to reproduce

1. Install the iHD driver (e.g. via the intel-media-driver package)
2. Load the driver by default in the environment by setting the following options in /etc/environment:

LIBVA_DRIVERS_PATH=/usr/lib64/dri
LIBVA_DRIVER_NAME=iHD

Moonlight settings (please complete the following information)

• Have any settings been adjusted from defaults?
  No

• If so, which settings have been changed?

• Does the problem still occur after reverting settings back to default?

Client PC details (please complete the following information)
Operating System: Fedora Linux 38
KDE Plasma Version: 5.27.7
KDE Frameworks Version: 5.109.0
Qt Version: 5.15.10
Kernel Version: 6.4.13-200.fc38.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i3-N305
Memory: 15.4 GiB of RAM
Graphics Processor: Mesa Intel® Graphics
Manufacturer: AZW
Product Name: EQ

• Moonlight Version: 4.3.1
• GPU: Intel UHD Graphics

Moonlight Logs (please attach)
❯ flatpak run com.moonlight_stream.Moonlight
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver ''
libva info: Trying to open /usr/lib64/dri/_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'iHD'
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'i965'
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'radeonsi'
libva info: Trying to open /usr/lib64/dri/radeonsi_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'nvidia'
libva info: Trying to open /usr/lib64/dri/nvidia_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'iHD'
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'i965'
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'radeonsi'
libva info: Trying to open /usr/lib64/dri/radeonsi_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'nvidia'
libva info: Trying to open /usr/lib64/dri/nvidia_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'iHD'
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'i965'
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'radeonsi'
libva info: Trying to open /usr/lib64/dri/radeonsi_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'nvidia'
libva info: Trying to open /usr/lib64/dri/nvidia_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'iHD'
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'i965'
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'radeonsi'
libva info: Trying to open /usr/lib64/dri/radeonsi_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'nvidia'
libva info: Trying to open /usr/lib64/dri/nvidia_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'iHD'
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'i965'
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'radeonsi'
libva info: Trying to open /usr/lib64/dri/radeonsi_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'nvidia'
libva info: Trying to open /usr/lib64/dri/nvidia_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'iHD'
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'i965'
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'radeonsi'
libva info: Trying to open /usr/lib64/dri/radeonsi_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'nvidia'
libva info: Trying to open /usr/lib64/dri/nvidia_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'iHD'
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'i965'
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'radeonsi'
libva info: Trying to open /usr/lib64/dri/radeonsi_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'nvidia'
libva info: Trying to open /usr/lib64/dri/nvidia_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'iHD'
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'i965'
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'radeonsi'
libva info: Trying to open /usr/lib64/dri/radeonsi_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'nvidia'
libva info: Trying to open /usr/lib64/dri/nvidia_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'iHD'
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'i965'
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'radeonsi'
libva info: Trying to open /usr/lib64/dri/radeonsi_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'nvidia'
libva info: Trying to open /usr/lib64/dri/nvidia_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'iHD'
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'i965'
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'radeonsi'
libva info: Trying to open /usr/lib64/dri/radeonsi_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'nvidia'
libva info: Trying to open /usr/lib64/dri/nvidia_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'iHD'
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'i965'
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'radeonsi'
libva info: Trying to open /usr/lib64/dri/radeonsi_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'nvidia'
libva info: Trying to open /usr/lib64/dri/nvidia_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'iHD'
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'i965'
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'radeonsi'
libva info: Trying to open /usr/lib64/dri/radeonsi_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'nvidia'
libva info: Trying to open /usr/lib64/dri/nvidia_drv_video.so
libva info: va_openDriver() returns -1

Additional context
vainfo output:

❯ vainfo
Trying display: wayland
libva info: VA-API version 1.18.0
libva info: User environment variable requested driver 'iHD'
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: Found init function __vaDriverInit_1_18
libva info: va_openDriver() returns 0
vainfo: VA-API version: 1.18 (libva 2.18.2)
vainfo: Driver version: Intel iHD driver for Intel(R) Gen Graphics - 23.1.6 ()
vainfo: Supported profile and entrypoints
VAProfileNone : VAEntrypointVideoProc
VAProfileNone : VAEntrypointStats
VAProfileMPEG2Simple : VAEntrypointVLD
VAProfileMPEG2Simple : VAEntrypointEncSlice
VAProfileMPEG2Main : VAEntrypointVLD
VAProfileMPEG2Main : VAEntrypointEncSlice
VAProfileH264Main : VAEntrypointVLD
VAProfileH264Main : VAEntrypointEncSlice
VAProfileH264Main : VAEntrypointFEI
VAProfileH264Main : VAEntrypointEncSliceLP
VAProfileH264High : VAEntrypointVLD
VAProfileH264High : VAEntrypointEncSlice
VAProfileH264High : VAEntrypointFEI
VAProfileH264High : VAEntrypointEncSliceLP
VAProfileVC1Simple : VAEntrypointVLD
VAProfileVC1Main : VAEntrypointVLD
VAProfileVC1Advanced : VAEntrypointVLD
VAProfileJPEGBaseline : VAEntrypointVLD
VAProfileJPEGBaseline : VAEntrypointEncPicture
VAProfileH264ConstrainedBaseline: VAEntrypointVLD
VAProfileH264ConstrainedBaseline: VAEntrypointEncSlice
VAProfileH264ConstrainedBaseline: VAEntrypointFEI
VAProfileH264ConstrainedBaseline: VAEntrypointEncSliceLP
VAProfileVP8Version0_3 : VAEntrypointVLD
VAProfileHEVCMain : VAEntrypointVLD
VAProfileHEVCMain : VAEntrypointEncSlice
VAProfileHEVCMain : VAEntrypointFEI
VAProfileHEVCMain : VAEntrypointEncSliceLP
VAProfileHEVCMain10 : VAEntrypointVLD
VAProfileHEVCMain10 : VAEntrypointEncSlice
VAProfileHEVCMain10 : VAEntrypointEncSliceLP
VAProfileVP9Profile0 : VAEntrypointVLD
VAProfileVP9Profile0 : VAEntrypointEncSliceLP
VAProfileVP9Profile1 : VAEntrypointVLD
VAProfileVP9Profile1 : VAEntrypointEncSliceLP
VAProfileVP9Profile2 : VAEntrypointVLD
VAProfileVP9Profile2 : VAEntrypointEncSliceLP
VAProfileVP9Profile3 : VAEntrypointVLD
VAProfileVP9Profile3 : VAEntrypointEncSliceLP
VAProfileHEVCMain12 : VAEntrypointVLD
VAProfileHEVCMain12 : VAEntrypointEncSlice
VAProfileHEVCMain422_10 : VAEntrypointVLD
VAProfileHEVCMain422_10 : VAEntrypointEncSlice
VAProfileHEVCMain422_12 : VAEntrypointVLD
VAProfileHEVCMain422_12 : VAEntrypointEncSlice
VAProfileHEVCMain444 : VAEntrypointVLD
VAProfileHEVCMain444 : VAEntrypointEncSliceLP
VAProfileHEVCMain444_10 : VAEntrypointVLD
VAProfileHEVCMain444_10 : VAEntrypointEncSliceLP
VAProfileHEVCMain444_12 : VAEntrypointVLD
VAProfileHEVCSccMain : VAEntrypointVLD
VAProfileHEVCSccMain : VAEntrypointEncSliceLP
VAProfileHEVCSccMain10 : VAEntrypointVLD
VAProfileHEVCSccMain10 : VAEntrypointEncSliceLP
VAProfileHEVCSccMain444 : VAEntrypointVLD
VAProfileHEVCSccMain444 : VAEntrypointEncSliceLP
VAProfileAV1Profile0 : VAEntrypointVLD
VAProfileHEVCSccMain444_10 : VAEntrypointVLD
VAProfileHEVCSccMain444_10 : VAEntrypointEncSliceLP

❯ ls /usr/lib64/dri/
crocus_dri.so iHD_drv_video.so kms_swrast_dri.so nouveau_drv_video.so r600_dri.so radeonsi_dri.so swrast_dri.so virtio_gpu_drv_video.so zink_dri.so
i915_dri.so iris_dri.so nouveau_dri.so r300_dri.so r600_drv_video.so radeonsi_drv_video.so virtio_gpu_dri.so vmwgfx_dri.so

[cgutman]

You're trying to point the Flatpak to libraries on the host, not inside the container. That's why it can't open them. If you clear LIBVA_DRIVERS_PATH var to let the Flatpak runtime use its own library path, I'll bet it will work.

[cgutman]

Fixed by flathub/com.moonlight_stream.Moonlight#30. flatpak update should pick up the update in a few hours.