This happens because the nVidia proprietary driver appears as a kernel module, but modinfo fails because nothing is returned:
bladernr@klaatu:$ lsmod |grep nvidia nvidia 9410995 52 bladernr@klaatu:$ modinfo nvidia ERROR: Module nvidia not found.
This happens because the nVidia proprietary driver appears as a kernel module, but modinfo fails because nothing is returned:
bladernr@klaatu:$ lsmod |grep nvidia
nvidia 9410995 52
bladernr@klaatu:$ modinfo nvidia
ERROR: Module nvidia not found.