On Wed, Jul 23, 2008 at 09:20:08AM +0100, Laz wrote:
that the only cards that could be convinced to sync at such low rates, i.e. 50 Hz for PAL, were the Matrox G400, G450, etc. Whenever I tried setting modelines with any other cards, I never got any output or an error when starting X.
also Radeons need a special 'invitation' for this by specifying:
Option "ForceMinDotClock" "12MHz"
I take it that more modern cards are a lot more flexible in this respect!
maybe. nVidia cards I tested so far work without special problems. But I've heard that only the closed source driver as capable of 50 Hz for PAL. I did't test myself the open source driver with that low frequency.
I hope one day the Nouveau project could give us enough support for PAL on nVidia with adequate drivers.
I'm currently using a G450 with softdevice connected to a CRT TV and it works pretty well most of the time with the odd flicker due to dodgy sync every now and than.
maybe you can convince the softdevice developers to give the patch a try:)
Using hardware to do the deinterlacing is _definitely_ the way forward,
for displaying interlaced content it's always the best to use a display with native interlace capabilities. So nobody has to deinterlace at all. You just route the plain fields straight through to the hardware.
especially for CRT. (Not sure whether LCDs display an interlaced streame "properly" or whether they try to interpolate somehow and refresh
I've heard modern LCDs do a pretty good job interpreting a conventional PAL signal. At the expense of huge amount of signal processing circuitry.