Thank you for providing the listing.
You have two sets of invidia drivers installed (515 and 525). You only should have one.
Once the libnvidia-encode is working correctly, it won’t try to tonemap on a CPU which is incapable.
Here are my Nvidia drivers, inclusive of development tools (you can ignore).
[chuck@lizum ~.2000]$ dpkg -l | grep nvidia
ii gpustat 0.6.0-1 all pretty nvidia device monitor
ii libnvidia-cfg1-525-server:amd64 525.105.17-0ubuntu0.20.04.1 amd64 NVIDIA binary OpenGL/GLX configuration library
ii libnvidia-common-525-server 525.105.17-0ubuntu0.20.04.1 all Shared files used by the NVIDIA libraries
ii libnvidia-compute-525-server:amd64 525.105.17-0ubuntu0.20.04.1 amd64 NVIDIA libcompute package
ii libnvidia-decode-525-server:amd64 525.105.17-0ubuntu0.20.04.1 amd64 NVIDIA Video Decoding runtime libraries
ii libnvidia-encode-525-server:amd64 525.105.17-0ubuntu0.20.04.1 amd64 NVENC Video Encoding runtime library
ii libnvidia-extra-525-server:amd64 525.105.17-0ubuntu0.20.04.1 amd64 Extra libraries for the NVIDIA Server Driver
ii libnvidia-fbc1-525-server:amd64 525.105.17-0ubuntu0.20.04.1 amd64 NVIDIA OpenGL-based Framebuffer Capture runtime library
ii libnvidia-gl-525-server:amd64 525.105.17-0ubuntu0.20.04.1 amd64 NVIDIA OpenGL/GLX/EGL/GLES GLVND libraries and Vulkan ICD
ii libnvidia-ml-dev 10.1.243-3 amd64 NVIDIA Management Library (NVML) development files
ii nvidia-compute-utils-525-server 525.105.17-0ubuntu0.20.04.1 amd64 NVIDIA compute utilities
ii nvidia-cuda-dev 10.1.243-3 amd64 NVIDIA CUDA development files
ii nvidia-cuda-doc 10.1.243-3 all NVIDIA CUDA and OpenCL documentation
ii nvidia-cuda-gdb 10.1.243-3 amd64 NVIDIA CUDA Debugger (GDB)
ii nvidia-cuda-toolkit 10.1.243-3 amd64 NVIDIA CUDA development toolkit
ii nvidia-dkms-525-server 525.105.17-0ubuntu0.20.04.1 amd64 NVIDIA DKMS package
ii nvidia-driver-525-server 525.105.17-0ubuntu0.20.04.1 amd64 NVIDIA Server Driver metapackage
ii nvidia-kernel-common-525-server 525.105.17-0ubuntu0.20.04.1 amd64 Shared files used with the kernel module
ii nvidia-kernel-source-525-server 525.105.17-0ubuntu0.20.04.1 amd64 NVIDIA kernel source package
ii nvidia-opencl-dev:amd64 10.1.243-3 amd64 NVIDIA OpenCL development files
ii nvidia-prime 0.8.16~0.20.04.2 all Tools to enable NVIDIA's Prime
ii nvidia-profiler 10.1.243-3 amd64 NVIDIA Profiler for CUDA and OpenCL
ii nvidia-utils-525-server 525.105.17-0ubuntu0.20.04.1 amd64 NVIDIA Server Driver support binaries
ii nvidia-visual-profiler 10.1.243-3 amd64 NVIDIA Visual Profiler for CUDA and OpenCL
ii xserver-xorg-video-nvidia-525-server 525.105.17-0ubuntu0.20.04.1 amd64 NVIDIA binary Xorg driver
[chuck@lizum ~.2001]$
Please clean out your older drivers and the i386 modules. Everything is 64 bit.
Don’t forget to update the initram-fs when done.
