If you let the screensaver time out while logged into the 'diags' command line -
The 'diags' system turns off the touch screen interface, leaving a tiny message in the graphic:
"use serial port to exit diags"
yeah buddy - you are no longer looking at the menu interface over the serial port but instead at the command line.
I think the solution (which I did not think of at the time) would have been:
Code:
idme bootmode diag
reboot
I'll try that the next time I go to sleep on the keyboard.