How to change default screen layout on Lubuntu?

Question

I tried to save my arandr settings to a ~/.screenlayout/default.sh path, but that doesn't work.

Answer 1

Lubuntu uses LXDE (Lightweight X11 Desktop Environment) which has built-in an application called LXRandR. It creates an autostart script for you.

To update the settings, simply run lxrandr in your command-line, edit your preferred screen layout and save the result.

The autostart script is saved within ~/.config/autostart/lxrandr-autostart.desktop. It uses xrandr command to set all up. To understand how the xrandr command works, I recommend you to read the ThinkWiki tutorial.