[mythtv-users] How to get interlaced PAL TV out on Nvidia?

[Clyde Stubbs]

I'm trying to get Mythtv going on an Nvidia nforce2 motherboard,
using the on-board GeForce4 MX video. It works fine to an LCD monitor,
but I cannot get it to display on my TV. XFree86 with either the nv
or the binary Nvidia driver doesn't seem to want to know about horizontal
scan rates below about 30kHz.

However, I know the video hardware will output PAL interlaced 50Hz/15Khz
or thereabouts video, because on bootup, the text mode display appears
on the TV just fine. But if I setup an interlaced modeline in XF86Config
with a horizontal scan rate less than 30kHz, X complains:

II) NVIDIA(0): Not using mode "640x480i" (bad mode clock/interlace/doublescan)

I notice that in the NVidia readme, they suggest specifying a horizontal
scan rate of 30-50kHz for a TV. That just won't work for my TV (nor a lot
of others).

Anyone have any suggestions?

TIA, Clyde