Dual monitors randomly flip-flop upon log-on or boot-up

I'm using Win7 Pro w/ Service Pack 1, and ATI Raqdion HD 4600 series Graphics card. Up until last week I had dual Sony E540 CRTs with extended display across both (left #1; right #2).

I finally upgraded to ASUS VW246 LCDs, automatically installed as Generic PnP; I could not find ASUS drivers. Since then, my display screens randomly flip-flop when I log on or boot up (i,e., the left becomes #2; the right #1). The mouse then cannot travel directly across from one to the other, but left off the left screen and appears to the right on the right screen.This does not happen every time, but often enough to be a real irritant.

When this happens, I swap the cables in order to re-establish the proper relationship. Otherwise everything works normally.

I've run through all the Control Panel settings, and am stumped. Needless to say, swapping the cables every day is getting to be a real pain. Appreciate any help.

The problem is that Windows rolls the dice on which monitor is which.

I want it to keep it's settings so I don't have to re-assign the monitors.

I've got the ASUS VW266H pair with an NVidia card. First, go to control panel > display > change display settings and setup your appearance. After that you can optionally download this to have wall paper spread across both monitors.

Hope this helps,
Burt

Once you have your settings as you like them, monitors in the correct position as Zepher suggested, did you check the box to select which monitor is to be the main monitor and apply, ok your way back out.

Kinda, but the basic problem is that even after I set up the monitors in Control Panel > Display, and designate which is #1 and #2, they will not keep their positions.

What I need to know is how to get Windows to stop rolling the dice on which monitor will be left and right when I log on.

On my machine, the nVidia driver also has the ability to control which is the #1 monitor. Have you tried you ATI driver?

I played with the "main monitor" designations a couple times, and finally, the monitors are locked down into their proper #1 and #2 positions.

Thanks for the advice.