[mythtvnz] 50Hz vs 60Hz refresh rate

[Brett]

> Using work PC winXP nvidia 256..custom modeline.
> LG 24" 1920x1200 hdmi would not work with custom modeline 50Hz.
> 
For the sake of completeness.
The LG L246WH 1920x1200 16:10 supports the following 50Hz modes.
hdmi:
1080p
1080i
720p
576p
576i

vga:
n/a

component:
1080i
720p
576p

note: there are NO native resolution 50Hz modes.

1080 looks rough scaled to full screen & forgot to try letterbox
mode...this might be a solution as it may pixel map one to one.