Black Screen after switching monitors

I installed a Windows XP - OpenSUSE 11.1 dual-boot on a ageing Dell Dimension 4700 for a friend. Whiles doing this it was using my 17" LCD screen with a 1280x1024 resolution.

All was well and I got everything working. I bring the PC to my friends house eager to show off OpenSUSE’s KDE 4.2.3 desktop but when I selected it in Grub the screen went blank and the monitors LED light’s flashed at me. The cause is that HIS monitor is even older than the Dell (Brand X 14" CRT screen) and it cannot go any higher than 1024x768. So we finally get to my question: How do I get X11 to display on this old screen. Here’s what I have tried.

I can use the failsafe option but only when I remove the “vga=<some number>” option. When I am in as su I ran “sax2 -r” which results in the screen going off again. When I turn it on after 5 minutes sax2 is finished but a reboot gives the same result.

I renamed “xorg.conf” to force it to make a new one but that didn’t work. I commented all of the monitor related lines in xorg.conf but that didn’t work either.

Can someone please give me the no doubt simple solution so I can continue my quest to show off how good Linux is? So far I’m not winning since Windows XP grumble just switched to the new monitors resolution and all was well.

Did you try switch to vesa with sax from your su login?

sax2 -r -m 0=vesa

Not yet since I did not know that command. I will try that next time I’m there. That will probably be a couple of days and I will post back here with the results. Thanks, Caf4926!