> I think it would also help if we could reach an agreement 
> over the terms "stable" and "good quality" and "everything 
> is working" because they are highly subjective.

For me I'd add a class; "Set-top-box quality"

It would mean that no judder and studder on HD-quality. With VDPAU
the problem still might be "50Hz vs 50.02Hz" -thing so you cannot get
frame accurate display. With every 5 seconds you might have duplicated
display of frame or dropped frame. This is not acceptable by my
standards. Typically "Set-top-boxes" can display frame accurate.

You can easily look your own modeline and dump it to a timings analyzator.
http://www.tkk.fi/Misc/Electronics/faq/vga2rgb/calc.html

>From MythTV wiki:
#    Modeline "1920x1...@50" 148.500 1920 2448 2492 2640 1080 1084 1089 1125
+hsync +vsync

This gives exact 50Hz 1080p mode. But does your VGA-cards internal clock
generator allow
exactly 148.500MHz. If VGA can only generate f.ex 148.460MHz clock then you
have 49.99Hz
output signal. Also is pulse width divisable by 8 etc.

- Jori

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