I have no NVIDIA hardware, still there are packages that install packages containing vdpau in their name.
Any such installation causes trouble as the CLI tty(s) (a.k.a. virtual consoles) are not available to use as long as any library related to vdpau are installed.
Removal of any package having vdpau in its name resolves the problem.
Is this the issue with vdpau?
System details :
Debian Stretch with GNOME.
Dell Inspiron 3543 Intel Core i5 5200 processor with integrated Intel HD graphics only.