Output problems with 945GM

[Matteo Brusa]

Hi,
i have some HDTV configuration issues with my 945GM based pc, i hope i'm in the right place to ask.
I'm running Ubuntu 7.10 and therefore the intel driver version 2:2.1.1-0ubuntu9.

VGA output
The VGA output works great, it uses the 1360x768 resolution when plugged to an HDTV. Unfortunately,
my actual TV has no VGA input, so i'm trying to get either HDMI (with DVI adapter cable) or
component running.
LDVS
In X, LVDS is always enabled although i have no LCD screen. I tried "xrandr --ouput LDVS --off"
without success, and the intel module does not support any xorg.conf option to shut it off. Could
this be the reason why xvidtune always shows 1024x768 and not the actual screen value?
Component
I always get 1024x768, no matter which Modeline i specify. Any suggestion?
TDMS-1
I got 1280x768 working, with noticeable overscan. How can i use the same 1360x768 with DVI, or get
rid of the overscan?

I also tried to disable DDC; in this case i cannot set any video mode with randr. Do i need to use 
the 915resolution tool, or it's not relevant anymore?
What is the output name for the component: TDMS-1, VGA?
Last question: X -verbose says "(==) intel(0): VideoRam: 262144 KB". Does it mean that it allocates 
256 megs for the as video memory?

Thanks in advance for any suggestion,
Matteo