[mythtv-users] JudderFree in 0.28

[Peter Rosemann]

About two years ago, somewhere between versions 0.25 and 0.27 I managed 
to do a JudderFree setup.
I'm running 0.28 for a few months now, because I changed my sattelite 
cabling to SCR/unicable.
Finally I did a fresh install on the frontend to separate it from the 
backend. Many details changed meanwhile, I don't know which one is 
causing my problems.

With this setup I'm no more able to get it judder-free. xrandr shows me 
all needed refresh rates (esp. 50 and 24, as I live in Germany). Problem 
is mythtv settings doesn't offer the real refresh-rates but the nvidia 
fake numbers instead. IIRC this was different on my previous setup. So 
all refresh rates are selectable by the fake numbers, but the automatic 
mode chooses same wrong ones always.

I see the following things changed from my earlier setup:
* xorg.conf isn't used in a default setup, but it seems to work if it's 
there as I see it's possible to list some modelines and the xrandr 
output changes.
* the EDID seems to be updated when TV is switched on or off (checked 
using VNC). I made sure Mythtv was started with TV on. In my old setup I 
did static modelines to make sure Mythtv gets the right numbers even if 
TV is off while booting.
* the previous xorg.conf is not working anymore. I think it's because 
nvidia changed API?
* there's no dynamic twinview in nvidia-settings (I think it wasn't 
there back then, but I set it in xorg.conf
* I'm nor sure if xrandr changed output format, esp. real vs. fake 
refresh rates. xrandr without options gives real refresh rates, xrandr 
--q1 gives fake ones.
* I exchanged the geforce 430 for a 640. I'm not sure if I checked 
judder-free operation at that time but I don't remember any judder. But 
our new Flatscreen is also significantly better in reducing judder, so 
you don't see much of it anyway (25 interlaced / 50 progressive video on 
60 refresh rate), but you see it super-fluid when it set correctly.
* nvidia driver is 346.96 now
* kernel is 3.19 now
* Distribution is Linux Mint, because Suspend is not working mythbuntu 
(black screen / crashing X on resume). Suspend doesn't work on Mint 
either, but it allows me to do Hibernate instead.
* Mythtv is 0.28 now. Maybe there's a problem in detecting refresh-rates.

Any ideas?

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