After changing a few lines in xorg.conf, I can no longer boot Ubuntu (I assume it breaks when trying to load up X), so I need a way to boot into a single-user mode. However, there seems to be zero guides on the Internet how to do it, because they all assume I can actually edit files on my computer, and I obviously can't.
So how do I load Ubuntu in single-user mode?
When I turned off splash, I figured out the problem: whenever Ubuntu can't load X server due to some error, it switches to tty1 and waits for the prompt, but doesn't turn off the splash.