Multiple Minis with Multiple Switched Monitors Losing Monitor 2

Hi.
I am working on an installation with six new Mac Mini's (Lion) and we are using dual screen HDMI outputs on both.  The Monitor 2 (HDMI) output goes to the display screen "on stage" and the Monitor 1 (Thunderbolt to HDMI) output goes to a local HDMI switched monitor for local viewing and programming.  The problem is that when we switch the local monitor from Mac 1 to Mac 2 and then back to Mac 1, Mac 1 will have lost its connection to Monitor 2, defaulting back to Single Monitor Output.  Changing the monitor arrangement is not an option.
Is there any way around this?
Thanks.

When you switch the monitor away from a particular Mac, that Mac no longer receives a signal back from the monitor. The Mac then assumes it has been disconnected which in reality is true. The Mac therefore reconfigures itself accordingly.
In some circumstances like yours, and more commonly people using a TV as a display via an AV Receiver, this can be counter to what is desired. There is a solution but it is not free, Gefen make a device called a HDMI Detective which 'learns' the signal the TV sends, and then will keep sending it to the Mac even when the TV (or monitor) is disconnected. They also make a DVI version see http://www.gefen.com/kvm/product.jsp?prod_id=8005 and http://www.gefen.com/kvm/dproduct.jsp?prod_id=4715
It should be noted that if you are running audio via HDMI, then when the Mac loses the HDMI connection it also resets the sound to go via the built-in speaker. The Gefen HDMI Detective Plus also solves this.

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