I downloaded, configured and installed kernel downloaded from kernel.org. While booting up this new kernel for the first time, this error screen shows which is pointing towards a missing or wrongly mentioned root device probably. But I didn't mention it explicitly, installation scripts did it. So if this is the error, can someone please tell how to fix?
Or if the cause may be something else, please tell what it can be?
NOTE: I am using VirtualBox for all this process. Don't want my laptop to become unbootable for this experiment.