Verify if you have 340xx Nvidia driver installed.

sudo pacman -Qs nvidia
local/lib32-libvdpau 1.1.1-2
    Nvidia VDPAU library
local/lib32-nvidia-340xx-utils 340.106-1
    NVIDIA drivers utilities (32-bit)
local/libvdpau 1.1.1+3+ga21bf7a-1
    Nvidia VDPAU library
local/nvidia-340xx 340.106-23
    NVIDIA drivers for linux, 340xx legacy branch
local/nvidia-340xx-utils 340.106-1
    NVIDIA drivers utilities

Make sure you remove lib32-nvidia-utils and install lib32-nvidia-340xx-utils via pacman.

sudo pacman -Rs lib32-nvidia-utils; sudo pacman -S lib32-nvidia-340xx-utils



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