I have a tricky problem regarding multiple monitors on KDE (Kubuntu). I have a laptop which, at home, is connected to two monitors – VGA and HDMI. That works only when the built-in laptop display is disabled (at least I was told that).
The problem is that now I took the laptop away and booted it up with no external monitors connected. The system remembers that the built-in display was disabled, so it disables it even though it is the only monitor connected. Obviously, that makes the laptop pretty much unusable. Switching to a terminal through Ctrl+Alt+F# works, I can login; even Guest works normally.
The question is, how do I (re)set an account's monitor settings through terminals, since I can't use the GUI?