[mythtv-users] HDTV output 1280x720 and X frustration

[Griffon --]

Hi folks, I'm hoping somebody can help me understand what steps I can
take to resolve a X desktop resolution problem I'm having.
Basically the situation is this, I have a laptop running just as a
frontend (off of KnoppixMyth CD, though I could do a full install if I
needed to). This is talking to the back end in the garage and all is
ok as far as that goes.

I need the laptop frontend to be outputting 1280x720 via the VGA port,
this is going to a Panyy LC13 tv on the RGB2. I can't for the life of
me seem to get X to do this, I have edited the XF86 config files and
added the resolution in the monitor area and the ModeLine "1280x720"
172.04 1280 1336 1616 1728 720 722 734 760 and restarted X but this
dosn't seem to take, no matter what I try I end up with something
around 1024 or lower and that just looks awful, and the UI dosn't fit
correctly on the Panny.

I'm a little frustrated, I swear I just want to right click on my dam
desktop and set a new res like in windows, it dosn't seem like this
should be act of god to do :p.

Anyway Is there a way to start x with a specific desktop size maybe?
Startx 1280x720? I have been reading and tweaking for two days and
still havn'g been able to get this to behave right. If anyone has any
ATI card and a LC13 I would be interested in seeing your XF86Config-4

Thanks!

-- 
-Griffon