On Mon, Feb 14, 2005 at 09:46:49PM -0700, Blair wrote:
> it is definatley a widescreen.  6600GT wants a 1920x1440 to output 1080i and 
> an 800x600 to output 480i. virtual screen size as reported by X for 1080i is 
> 1920x1440 and 2306x1024 when I run in dual head mode with the nVidia set to 
> output 480i.  I have very little doubt that this is being managed by th 

Very curious.  Normally, one sets up a resolution that matches the aspect
ratio of the monitor.   You are using a 4:3 aspect ratio resolution but
you have a 16:9 monitor.   

Unless your card does something magic, what's happening is something
you probably don't want.  You're running 1920 x 1440.   Xvideo is
taking your 1080 and 720 line high videos and expanding them to 1440
lines high.

This goes to your TV.  Your TV is then compressing the 1440 lines down
to 480.   I guess since it is compressing so far you are not losing much.
If you had a 1080 line TV this would lose you some resolution.  But it's
still a pretty odd thing to do.

You might want to try some 16:9 resolutions.   The bad news is that from
what I have seen, the nvidia driver xvideo will not downconvert 1080 lines
to 480, I think it wants 600 or 768 or something -- I had this problem
when using TV-out.

I might recommend you either run at 1920x1080 or 1280x720 or even at
both, thanks to xrandr.   In this case, there would be no downconverting
in your computer or card, just in your TV, which knows how to do it best
for its own resolution.


> should line up.  I have not discovered this panacea with my rig, for whatever 
> reason, probably because I don't want to risk my TV jacking with modelines 
> even if it is 4 years old now.  It seems a bit strange to me as well, but it 

If your TV will accept 1920 x 1440, I suspect it can take just about
anything!
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