[Hack_kid]

is the xorg.conf esential or just the driver? i updated the driver but have my own default xorg and i dont have some of those settings including the modlines are those needed for smooth playback as i dont think i see any problems with it what should i be looking for to know if its timed correctly?

[ozp1]

is it possible to just highlight the options or parameters required for the perfect playback?

I fear that if we use the entire xorg.conf this could lead to problems with mouse, monitor or other custom stuff

[john.cord]

...

[neil.j1983]

your top link is outdated since the 302 drivers.

and your bottom link only has a 24hz modeline, and no 23,976 modeline.

perhaps the original xorg that i've reposted isn't the best, but it's done me fine, and it's certainly not useless.

[Hack_kid]

Are the modlines essential?

[FernetMenta]

If you want to get 23.976 instead of 23.971, they are.

[Hack_kid]

do 2 modelines one for 24 and 23.976 or just 23.976

[Jönke]

If you want to get 23.976 instead of 23.971, they are.

When pressing "0" and gui shows 23.97 does that mean 23,971 and xorg.conf modeline is not loaded correct ? Should it be 23,98 to be true 23,976 ?

[FernetMenta]

Nope, the codec screen does not show actual refresh rate, it only shows a rounded value for it. Execute xbmc-xrandr, then you'll see what modes are available.

[john.cord]

If you want to get 23.976 instead of 23.971, they are.

sorry WHAT?

Please explain this!

I thought that modelines are not needed if the correct 24p mode is in modepool .... the Modepool in Xorg.0.log is showing me only one 24p mode (1920x1080_24). And i thought that 24p means 23,976 and every Material which is 24p is 23,976...

What is the difference in setting the modes via modelines or just using the modes of the modepool?

For me i get perfect stutterfree playback of 24p material (23,976) with the posted xorg.conf without modelines like the one in the other xorg.conf posted... hardware is nvidia ion 2 gt218 gpu.

OK i got it... defaul EDID Mode 24p is not 23,976 but 23,971 but as far as i understand xorg chooses the EDID 24p mode and it is not possible to use a modeline. Another thing is that i read that xbmc cannot difference between the 24p modes so if you playback a 24p file with 24hz and another one with 23,976 everytime the EDID 24p mode gets chosen.

In my case the 1920x1080_24 Mode is 23,971. Would it be better to use a modeline with 23,976 for 24p playback? I did not notive stuttering or something but i read that with 23,971 a frame gets dropped every 40 seconds or so...

[legoman666]

And i thought that 24p means 23,976 and every Material which is 24p is 23,976...

I was under that impression as well

[john.cord]

do 2 modelines one for 24 and 23.976 or just 23.976

as i understood it is only possible to set one modeline for 24p because of a limitation of xrandr but because of the fact that alle hd material from bluray is 23,976 it is best to set a modeline for 23,976

[pumkinut]

And i thought that 24p means 23,976 and every Material which is 24p is 23,976...

I was under that impression as well

No, 24fps and 23.976fps are not the same. Google the Intel IGP 24p bug. Intel's Sandy Bridge IGP, and previous I think, cannot properly render 23.976fps content. Instead it's rendered at 24fps. This means that about every 40 seconds there is a skip/judder in the framerate as the output and input framerates catch up to one another.

[FernetMenta]

OK i got it... defaul EDID Mode 24p is not 23,976 but 23,971 but as far as i understand xorg chooses the EDID 24p mode and it is not possible to use a modeline. Another thing is that i read that xbmc cannot difference between the 24p modes so if you playback a 24p file with 24hz and another one with 23,976 everytime the EDID 24p mode gets chosen.

NVIdia drivers >= 302 have support for xrandr 1.3. The values for refresh rate are not rounded anymore and can be distinguished even if they only differ by a fraction. Now you can add 24.000 and 23.976 modelines. Run xbmc-xrandr to see what modes are available.

In my case the 1920x1080_24 Mode is 23,971. Would it be better to use a modeline with 23,976 for 24p playback?

Ideally you have a 23.976 mode for 23.976 material and a 24.000 mode for 24.000 material. E.g. Elephants dream is 24.000.

[john.cord]

Ok, but i am still using 295.53 because i'm on Ubuntu Maverick and theses are the latest drivers for 10.10... looks like i should do a release upgrade.