T400- make the external monitor primary problem.

I use T400 and Acer p223w monitor.
From some reason I cannot make the external monitor to be the primary monitor.
Using the Presentation Doctor I have the option to define the external monitor as the primary but when I test it, it says that I have illegal parameters of color depth and resolution.
The problem is that the parameters I use are the parameters currently defined on the two monitors (which mean the monitors have no problem working that way).
Any other color depth resolution combination won’t solve the problem.
On the other hand using the same parameters if I configure the laptop monitor to be the primary everything works just fine.
Any idea what causing it and how to solve it will be highly appreciated.

Since I have a German Windows client I can only guess the wording on the english client, but try the following, which worked on my T500:
Bring up the mobility center by pressing Win+X
Click the button to connect an external monitor
Choose to use the external monitor as the only display
Now that the external monitor is the only display, it is also primary of course. Now you can use the normal windows display dialog (Right-Click on desktop -> Configure -> Display) to extend the desktop to the internal display which will be secondary then
done
In my case windows remembers this configuration and you do not have to do these steps again after reboot or when you reconnect the external monitor.
Hope this helps for the T400, too.
Message Edited by pfahsel on 03-18-2009 02:18 AM

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activate
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set y0 to 200
set dx to 800
set wx to 600
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Andy ______________________________________
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T400- make the external monitor primary problem.

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