MacPro: How to prevent scanning for monitor after sleep?

Hi everybody,
So here's the deal: When I power up my MacPro or wake it up from sleep, it seems to do a quick search for connected displays and activates only the DVI output(s) which have a monitor connected to them. While I understand that behavior at boot time, I find it really troublesome when waking the MacPro from sleep.
Here's why:
I rarely turn off the MacPro completely, I much rather put it to sleep when I'm away. What I do, however, is to turn off the huge 30'' display that drains a lot of power when left on. When I come back, I just have to turn the display on before turning on the MacPro and everything is fine.
However, there's one scenario where I systematically get caught and that's really... really annoying! It happens in combination with the EyeTV Software. When I'm away by the time a scheduled show starts, the EyeTV wakes up the MacPro and starts recording. That's exactly what it's supposed to do. However, since the monitor is turned off by the time the MacPro wakes up, it won't recognize it and the graphics card won't send any signal! So when I come back to the computer and turn on the screen, It says "No Signal". The solution at this point is putting the MacPro to sleep briefly and resume it with the display turned on this time. However, putting the Mac to sleep while EyeTV is recording a show causes the recording to be rendered useless.
Is there a way to prevent the MacPro from rescanning for monitors after sleep? Or maybe there's a key combination to let it rescan manually?
As far as I remember, it didn't do the rescan-monitors-after-sleep thing under Tiger, but not sure about that...
Any help would be highly appreciated!
MasOS X: 10.5.2 Leopard
Mac Hardware: MacPro Dual-Core Intel Xeon 3GHz (from mid-2007)
Graphics card: NVIDIA GeForce 7300 GT
Monitor: Dell 3008WFP
Greetings,
Mike

What I do, however, is to turn off the huge 30'' display that drains a lot of power when left on.
The display should go to "Active-off mode" (amber power light) when the computer sleeps. This uses less than 2 watts.
<http://support.dell.com/support/edocs/monitors/3008WFP/en/ug/about.htm#Product% 20Features>
If you do want the monitor off (e.g. to save power while EyeTV is recording), you could use a DVI Detective
<http://www.gefen.com/kvm/product.jsp?prod_id=4714>

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