This bug is probably fixed in newer driver version 520.56.06:
* Fixed a regression in 515.76 that caused blank screens and hangs when starting an X server on RTX 30 series GPUs in some configurations where the boot display is connected via HDMI.
https://www.nvidia.com/Download/driverResults.aspx/193764/en-us/
Hope it'll be updated in Ubuntu repos soon to ensure smooth upgrading to Kinetic...
This bug is probably fixed in newer driver version 520.56.06:
* Fixed a regression in 515.76 that caused blank screens and hangs when starting an X server on RTX 30 series GPUs in some configurations where the boot display is connected via HDMI.
https:/ /www.nvidia. com/Download/ driverResults. aspx/193764/ en-us/
Hope it'll be updated in Ubuntu repos soon to ensure smooth upgrading to Kinetic...