[IDEA] Raspberry Pi Touch Display 2 release

[2800GT]

When you edited cmdline.txt did you add the new command to the existing line of settings, not as a new line in the file ?
I assume your screen is plugged into the connector marked "CAM / DISP 1" not "CAM / DISP 0"

I usually do my screen setup commands in config.txt and I thought cmdline.txt changes only affected the text display during boot so I'm probably not much help