Quote Originally Posted by Gondarc View Post

My reason for going elsewhere was Knoppix suddenly adopting 1280x1024 as the default setting for my 1024x768 Fujitsu Siemens monitor, and resolutely ignoring all my attempts to reset this in configuration, with the result that I could not get anything displayed ... the monitor is now 10 years old, still going, undimmed and without a dropped pixel, as a second monitor on my son's temperamental W7 machine.
...
Any suggestions?
I would first try lxrandr (the gui);
If that doesn't give you a 1280 choice, then use xrandr in a terminal to see what
your choices are; hint, just xrandr <enter> gives you the name of the display and
all the choices it knows.
Sometimes lxrandr doesn't know all the choices.

And, good luck.