I don’t know if this is the case for everyone, but following this discussion: Black screen after install of nvidia driver ubuntu - #175 by remo.fischer
I tried to unplug one of my two DP monitors and I was able to boot with the kernel running the NVIDIA drivers
Mon Jun 14 03:18:06 2021
±----------------------------------------------------------------------------+
| NVIDIA-SMI 465.27 Driver Version: 465.27 CUDA Version: 11.3 |
|-------------------------------±---------------------±---------------------+
I still need to test with an HDMI cable … hope that helps as a temporary workaround.
EDIT:
It does work with HDMI