Neither shell nor GUI appearing on HDMI interface Narcissus generated image

I’ve generated an image and file system using the narcissus choices shown in the attached pdf file. Everything boots fine from the SD card but after it asks me to login to the user account (which is unexpected in itself since I just asked for command line) the HDMI-attached monitor goes black (no command line or GUI) but the mouse cursor is visible and responds to mouse movements. Thinking that it might have something to do with the boot args I modified the cmd file to set the dvimode variable to the native resolution of the monitor but the result was the same. Console goes to the root login. Anybody encounter this before?

narcissus.pdf (226 KB)

boot.txt (717 Bytes)