"
Nouveau is open-source, but it may not offer the same level of performance as the NVIDIA proprietary driver,
Nouveau may have limited support for certain NVIDIA features.
"
Done as recommended : " uninstall the Nvidia driver plugin and run touch /boot/config/modprobe.d/nouveau.conf then reboot "
Nouveau driver fully working ...
However will be better to have nvidia gpu fully recognize form my "encoders"
So still expecting a old compatible version of nvidia drivers