How to force display resolution at 1280x1024, or any specific value?

I bought a KVM from aten, a cs-1764 DVI model, on which both my powermac G4 and G5 attached. The console monitor is Samsung 172x with native resolution at 1280x1024.
For both G4 & G5, the systems can detect my monitor as syncmaster and use its native resolution if I start the system from either box. But when I switch from another, for G4, I have to re-detect the display if I didn't start from that box, the system only knows it's a 1024x768 KVM monitor. For G5, it automatically detects syncmaster everytime but takes 5 seconds to be ready for use.
Is it possible to turn off autodetect feature at specific DVI output and force it to use resolution as designated?
regards,
Burke
PowerMac G5 Dual Mac OS X (10.4.7)

I have the exact same KVM and the same issuue with my powermac G5. I just tried SwitchResX and I don't think it helps. It can configure and fix a resolution for a particular monitor, but the problem with using the KVM, is that it thinks the monitor has been disconnected and so re-arranges the desktop. When you then switch back, it re-arranges it again to fit the 'new' display.
What is needed (I think) is a way to force the resolution of the machine to stay the same when the monitor is disconnected. My G4 and Intel Minis have no problem with this.
Any more ideas anyone?

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How to force display resolution at 1280x1024, or any specific value?

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