Macbook Pro + DVI to HDMI cable + HDTV = only 1080i?

Question

Hi all,
I connected my MBP to my TV via a DVI to HDMI conversion cable ($24 from Fry's), but the highest resolution I am getting is 1080i (confirmed on the computer, and the system readout on the TV). Are there other settings that I missed (in the computer or the television) that I need to configure in order to get full 1080p out of this setup? Or is it the cable? Any help on the matter would be great!
I was hoping that the picture quality from the MBP to the TV would be greater, so being able to output 1080p would really help out. I haven't tried connecting via the DVI to VGA cable, but I'd really like to run this through my receiver, and my receiver does not have a VGA in, thus my want to use HDMI.
Also, is there a setting in OSX that allows you to close the computer without it powering down into sleep mode?
Computer: Apple Macbook Pro 17" High-res 2.4 GHz
Television: Sony BRAVIA V3000 46"
Receiver: Onkyo TX-SR605

Answer 1

Hi guys, I just got my Samsung LE40M87BD working on my MacBook Pro running Leopard in full 1080p resolution. Steps:
Install DisplayConfigX from www.3dexpress.de
Start DisplayConfigX
Select the correct monitor in the top dropdown list
Under Monitor, my settings are (mostly default):
Refresh rate 45.00-61.00
Horizontal frequency 10.00-120.00
Pixel Frequency 138.50 (specified in the Samsung manual)
Default refresh rate 60 (specified in the Samsung manual)
Under Resolution, I created a new setting:
Kind = Timing
H V
1920 Active 1080
48 Front Porch 3
32 Sync 5
80 Back Porch 23
Untick Interlaced if it is ticked!
Select Pixel Frequency and type in 138.500
Check the following (if the numbers are not correct, you have made a mistake above):
Check that Horizontal is 66.587 KHz (specified in the Samsung manual)
Check that Refresh rate is 59.934 Hz (specified in the Samsung manual)
Check 'Enabled'
Click Done
Go to Install, click Install
Restart the system as suggested
Your monitor not here? The challenge is to find the Front Porch, Sync and Back Porch settings that work for your monitor. The trick is to check if they are in the manual, and if not, assuming that the horizontal and vertical frequencies are, Google the horizontal and vertical refresh rates - they are pretty certain to yield the right settings! E.g. I Google'd '66.587 59.934 front porch'. Alternatively, try this if you are more technical: http://www.vesa.org/Public/CVT/CVTd6r1.xls
Hope this helps!