FC4: jittery DVD playback

[Robin Laing]

Neil Bird wrote:
> 
>   Last time I tried this (same DVD drive, FC3) it was fine.
>   Now, FC4 and one spanking new mobo later (was dual 533Mhz Celerons, 
> now 3.0Ghz P4) I tried a DVD yesterday and it plays jittery:  I get a 
> partial secnod of playback, then a brief pause, then play, then pause.  
> The glitch seems to maintani the same periodicity, and audio sounds fine.
> 
>   And I get the same symtom with both ogle and xine.
> 
>   Any thoughts as to where to look?  I believe I've enabled 32-bit DMA 
> on my DVD ROM drive.
> 

The issue could be the controller that is on your new MB.  I have a 
new laptop that has the same problem.  I cannot get DMA to work for 
the controller chip.  I have not had a chance to try different things 
yet but the latest kernel is much better.

Have you installed xine and run xine-check?