13" MacBook Pro with Win 7 and External VGA gets 640x480

Posted by Jim McKeeth on Super User See other posts from Super User or by Jim McKeeth
Published on 2009-10-05T02:23:09Z Indexed on 2010/03/30 13:53 UTC
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9400m

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windows-7

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macbook-pro

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nvidia

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external-display

I have a brand new 13" MacBook Pro - 2.26 GHz and the NVIDIA 9400M Video card. I installed Windows 7 (final) in boot camp and booted up to Windows 7. Installed all the drivers from the Apple disk and it was working great. Then I attached the external VGA adapter (from apple) to connect to a projector and it dropped down at 640x480 resolution. No matter what I did it wouldn't let me change to a higher resolution if the external VGA was connected. Once it disconnects then it goes back to the normal resolution.

If I am booted into Snow Leopard it works fine.

I tried updating the NVIDIA drivers and it behaved exactly the same.

Ultimately I want to get 1024x768 or better resolution when connected to an external display. If it isn't fixable then I am curious if anyone else has seen this, if it is a known issue, and who to contact for support (Apple, Microsoft or NVIDIA?)

Update: Just attaching the Mini-DVI to VGA adapter kicks it into 640x480, no projector is required. I tried forcing the display driver from Generic PnP Monitor to one that supported 1024x768 and that didn't work either.

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