The driver for intel with xrandr causes "tearing" or slight slideways flickering that cycles every few minutes. I disabled TMDS-1 and LVDS with a script that loads with the desktop, but the flickering persists and I remember that it has to be disabled at the xorg level to get rid of the flickering. This is a known bug during one of the intel driver eras in debian (it existed in an earlier version of Ubuntu as well) and I have the fix but knoppix rewrites xorg so there is no way I know of to have it work, as it needs to be in effect before the desktop loads.

This device is an asus eee-box. VGA compatible controller: Intel Corporation Mobile 945GME Express Integrated Graphics Controller (rev 03)

I need to add a few lines to my xorg.conf and have them remain at the next boot: what is the best way to do this? I could cp xorg.conf to another directory and just have a command in /etc/X11 to rc.local to cp it back?

Code:
Section "Monitor"
        Identifier 	"ExternalMonitor0"
        Option 		"Ignore" 		"True"
EndSection

Section "Monitor"
        Identifier 	"ExternalMonitor1"
        Option 		"Ignore" 		"True"
EndSection
and under device

Code:
	Option 	    "monitor-TMDS-1" 	"ExternalMonitor0"
	Option 	    "monitor-LVDS" 	"ExternalMonitor1"