Another way is to blacklist the nvidia-gpu i2c with the commands as follows:
$ sudo su
root@user# echo “blacklist i2c_nvidia_gpu” > /etc/modprobe.d/blacklist_i2c-nvidia-gpu.conf
root@user# sudo update-initramfs -u
root@user# reboot
With this mothod, you can not see the nvidia-gpu i2c error again.
Please remind that user is your own registering name while installing the Ubuntu system.
Cheers,
Mike