Resolution issues w/ HDTV via DVI/VGA

Hey everyone,
I just bought an HDTV and would like to set my PowerBook up with it.. When I connect the thing with a DVI->VGA adapter, the system recognizes it, but gives it a max resolution of 1024x768. I have tried changing the colors to Thousands with no luck.
The strange thing here is I have a Mac Book Pro 17" with the same version of Tiger installed.. when I hook that one up with the same cable and adapter, it automatically sets it to the native resolution of the set, 1366x768.
The MBP has a Radeon X1600, my PowerBook has a Radeon Mobility 9700 64MB.
How can I make my Powerbook drive the screen at its native resolution?
Thanks,
~s

Any ideas at all?
New development: My G4 Digital Audio only offers me up to 1024x768 on the set, but much higher on every other display I have. Still, only the Macbook Pro will drive it at native resolution.
Help?!

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Why are you not trying to use the DVI to DVI?
The reason the card output of 1080i does not look as
good is because the tv is downgrading the sigal to
720p since that is its max.
My tv doesn't have DVI only HDMI, but I have a HDMI to DVI cable.
So even though the tv is only supposed to capable of 720p, the card pushes it higher, then the tv the downgrades the signal again? The tv itself says 1080i when I switch it over to the HDMI input whereas my directv input signal says 720p.
This a possible ATI driver issue (not supporting that
res)or maybe a hz synch issue? The DVI port of the TV
is meant for HDCP so if may have the feedback needed
by the vid card for proper synching.
Very curious to see what you do, because I am looking
to do the exact same thing.
I have a DA with a Mac 9800 Pro and want to replace
my 20" ACD with a 26" LCD tv that can double as my
monitor vs buying a usb tv input device for the DA.
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800
Check the native resolution of the tv you're considering. It didn't dawn on me till later, but my 17in flat panel imac g4 has a better native resolution then the 26in tv. so even though its bigger, not really gaining any extra space.

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Message was edited by: pbeauverd

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Hello,
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I have just bought a Mini Display - VGA adaptor which I am plugging to a Samsung 23' LED monitor via a VGA/DVI adaptor. I manage to get a clone view but unfortunately, the maximum resolution offered is 1650x1050 when my Samsung LED monitor has resolution of 1920x1080. Therefore, part of the screen remains black.
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http://support.apple.com/kb/HT3131
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I am trying to connect my Macbook to a Sony Bravia HDTV via HDMI, but are unable to get one to recognize the other. I am not sure what the problem is.
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I hooked my Sony .Bravia 40" up to my MacBook with no problem. From your description, it sounds like you may also have a bad DVI->HDMI cable. I'm using the stock Apple miniDVI adaptor mated to my DVI->HDMI cable.
I was going to go the route you took and use the VGA port on my Bravia, but thought it might limit me to "side" letterboxes since I thought VGA basically stood for 640x480 or 4X3 format. I'm surprised that you get 1920x1080 from a VGA cable. While your picture may be great, by definition I understand high to low video quality in order is...
HDMI/DVI, Component, s-video, VGA, and lastly, A/V cables.
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Resolution issues w/ HDTV via DVI/VGA

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