I've recently upgraded my hardware to a new laptop, and installed the latest kubuntu build on the new machine. Various advice here and elsewhere led me to hope that I could bring all of my KDE settings over to the new machine by copying my home directory and .kde dir over to the new machine. I've done that, but it comes up with a mostly blank garbled screen with blue gibberish along the bottom instead of the menu bar - basically unusable in the graphical interface. Presumably this is because the old graphics settings aren't compatable with the new hardware (the monitors are the same, but the new machine has a new graphics card.)

I can log in to a command-line tty at Ctrl-Alt-F1. I'm looking for how to reset the display settings without losing (or with losing as little as possible of) my other settings; I imagine wiping my entire .kde directory would get me back, but I'm hoping for something less drastic. Any suggestions?