I am running 12.04 on a Dell 5430 laptop with external Dell monitor as a real newbie. My monitor is running at 1152x864 rather than the 1920x1080 that is capable of.
I have followed the various posts and, using
xrandr, have set the resolution to 1920x1080 successfully. To make it persistent different posts suggest updating
/etc/kde4/kdm/init/default. However I cannot find any of those files in
Where do I add a new modeline to make the resolution change persistent?