Your system information

• Steam client version (build number or date): aug 6 2020, 22:00:53
• Distribution (e.g. Ubuntu): Ubuntu 20.04
• Opted into Steam client beta?: [Yes/No] yes
• Have you checked for system updates?: [Yes/No] yes

Please describe your issue in as much detail as possible:

When using remote play to stream games from a host pc to a client one, it crashes 1-2 seconds after launching on the client machine when using Nvidia prime render offload (on-demand profile option)

Tried launching steam with __NV_PRIME_RENDER_OFFLOAD=1 and __GLX_VENDOR_LIBRARY_NAME=nvidia and the issue still persist. The last log line on the console is an error regarding ffmpeg:

ffmpeg error: VDPAU device creation on X11 display :0 failed.
CVDPAUAccel: av_hwdevice_ctx_create() failed
ffmpeg verbose: Opened VA display via X11 display :0.
ffmpeg verbose: Initialised VAAPI connection: version 1.7
ffmpeg verbose: Unknown driver "Intel iHD driver for Intel(R) Gen Graphics - 20.1.1 ()", assuming standard behaviour.
VAAPI hardware decoding
ffmpeg verbose: Reinit context to 1536x864, pix_fmt: vaapi_vld
CVAAPIAccel: vaPutSurface() failed: unknown libva error

System settings
CPU: Intel(R) Core(TM) i9-8950HK CPU @ 2.90GHz
GPU: GeForce RTX 2070 Mobile

Steps for reproducing this issue:

1. Select Prime profile Nvidia On-Demand
2. Select "Enabled Hardware decoding" in steam remote play client options
3. Select "stream" for a given game using remote play

The client will open shortly (you can hear sound for a brief sec) before it crashes and closes up.