We are running a monitor and beamer on a dell Optiplex 9020 USFF. The beamer is connected with the computer via a HDMI-Matrix. Dthe monitor is connected by DVI. After Lectures, HDMI-Matrix and beamer are turned off. The computer will go to standby. For the next lecture matrix and beamer will be restarted. Mostly after this, comcuter will come back from standby. Now often the computer will not recognize the return of HDMI-Matrix or just will not went back to Clone mode again.

I now would like to set clone mode on the display driver permanently and protect this from being changed by users.

Can anybody suggest a solution?

Our drivers are all current versions from Dell website.