# Pastebin 28eHRQgk
(H2U B=opsis) xf@yogacore:~/HDMI2USB-misoc-firmware$ sudo hdmi2usb-mode-switch --mode serial
WARNING:root:unbind-helper not found, will have to run as root!
Traceback (most recent call last):
  File "/usr/local/bin/hdmi2usb-mode-switch", line 9, in <module>
    load_entry_point('hdmi2usb.modeswitch==0.0.0+93.gd0eb917', 'console_scripts', 'hdmi2usb-mode-switch')()
  File "/usr/local/lib/python3.5/dist-packages/hdmi2usb.modeswitch-0.0.0+93.gd0eb917-py3.5.egg/hdmi2usb/modeswitch/cli.py", line 204, in main
    "{} mode only valid on the opsis.".format(newmode))
AssertionError: serial mode only valid on the opsis.