I changed my ubuntu screen-resolution and now it's everything black and I can't change it againd to the old resolution. What do I do?
Thank you.
Try this:
xrandr -s 800x600
Adjust resolution itself as necessary. This works if you've got a running X11.
If the GUI won't start at all, you may want to try removing xorg.conf
; as far as I remember it should be automatically regenerated. But just in case, let's just move it aside instead of deleting it.
sudo mv /etc/X11/xorg.conf /etc/X11/xorg.conf.backup