Actually, for anybody having this issue, I just googled a few times more. I found that there might be some issue in the nvidia-driver-460 after the version 80. Solution, install by hand the version 460.73. (This solution worked for me.)
I got the tip from here:
issue: Ubuntu freezing on boot after Nvidia driver installation
solution: 465.24.02 page fault - #102 by chainofflowers
driver version that worked for me (460.73): https://us.download.nvidia.com/XFree86/Linux-x86_64/460.73.01/NVIDIA-Linux-x86_64-460.73.01.run