On starting live-usb, it says 'hit tab for options' or something like that.
I hit TAB, then I see the command line. I add my option drm.debug=14 to the
end. Now what? If I hit RET, it proceeds to boot.
But looking at journalctl, it doesn't appear that my added command line
option was used!
--
Those who fail to understand recursion are doomed to repeat it