nvidia chromium with VP9 hardware decode?

Hey,

Im trying for a few days to get my stadia on linux to work. But everything i do i cannot get vp9 hardware decoding.

I have already made a issue here: https://github.com/saiarcot895/chromium-ubuntu-build/issues/64

But maybe someone here have the answer.

I have a debian installation with nvidia version:

ii  nvidia-driver                         440.36-1                             amd64        NVIDIA metapackage
ii  nvidia-driver-bin                     440.36-1                             amd64        NVIDIA driver support binaries
ii  nvidia-driver-libs:amd64              440.36-1                             amd64        NVIDIA metapackage (OpenGL/GLX/EGL/GLES libraries)
ii  nvidia-egl-common                     430.64-1                             amd64        NVIDIA binary EGL driver - common files
ii  nvidia-egl-icd:amd64                  440.36-1                             amd64        NVIDIA EGL installable client driver (ICD)
ii  nvidia-installer-cleanup              20151021+10                          amd64        cleanup after driver installation with the nvidia-installer
ii  nvidia-kernel-common                  20151021+10                          amd64        NVIDIA binary kernel module support files
ii  nvidia-kernel-dkms                    440.36-1                             amd64        NVIDIA binary kernel module DKMS source
ii  nvidia-kernel-support                 440.36-1                             amd64        NVIDIA binary kernel module support files
ii  nvidia-legacy-check                   430.64-1                             amd64        check for NVIDIA GPUs requiring a legacy driver
ii  nvidia-modprobe                       430.50-1                             amd64        utility to load NVIDIA kernel modules and create device nodes
ii  nvidia-persistenced                   430.64-1                             amd64        daemon to maintain persistent software state in the NVIDIA driver
ii  nvidia-settings                       430.64-1                             amd64        tool for configuring the NVIDIA graphics driver
ii  nvidia-support                        20151021+10                          amd64        NVIDIA binary graphics driver support files
ii  nvidia-vdpau-driver:amd64             440.36-1                             amd64        Video Decode and Presentation API for Unix - NVIDIA driver

With version 440 we have support off VP9

<i>Added VP9 decode support to the NVIDIA VDPAU driver. See the VDPAU Support appendix in the README for supported VP9 decoder profiles.</i>

bron: https://devtalk.nvidia.com/default/topic/1065983/linux/linux-solaris-and-freebsd-driver-440-31-long-lived-branch-release-/post/5398163/#5398163

Here some extra information:

grep -iE 'vdpau | dri driver' /var/log/Xorg.0.log
[     7.370] (II) NVIDIA(0): [DRI2]   VDPAU driver: nvidia
grep -iE 'nvidia gpu Q' /var/log/Xorg.0.log
[     6.002] (II) NVIDIA(0): NVIDIA GPU Quadro P1000 (GP107GL-A) at PCI:1:0:0 (GPU-0)

But when i run vainfo i don’t see any vp9 support :/

# vainfo 
libva info: VA-API version 1.5.0
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/nvidia_drv_video.so
libva info: Found init function __vaDriverInit_1_2
libva info: va_openDriver() returns 0
vainfo: VA-API version: 1.5 (libva 2.5.0)
vainfo: Driver version: Splitted-Desktop Systems VDPAU backend for VA-API - 0.7.4
vainfo: Supported profile and entrypoints
      VAProfileMPEG2Simple            :	VAEntrypointVLD
      VAProfileMPEG2Main              :	VAEntrypointVLD
      VAProfileMPEG4Simple            :	VAEntrypointVLD
      VAProfileMPEG4AdvancedSimple    :	VAEntrypointVLD
      <unknown profile>               :	VAEntrypointVLD
      VAProfileH264Main               :	VAEntrypointVLD
      VAProfileH264High               :	VAEntrypointVLD
      VAProfileVC1Simple              :	VAEntrypointVLD
      VAProfileVC1Main                :	VAEntrypointVLD
      VAProfileVC1Advanced            :	VAEntrypointVLD

Can someone help me with this problem ?