[mythtv-users] Strange Live Tv synchronization problem

[Matteo]

Hi,
This is the first time for me in this list.
I just set up my first myth box and almost everything works fine.
My system is composed of a VIA EPIA ML8000 PVR-250
512 Mb DDR 200 GB hdd maxtor.
Tv recordings are perfect and playbacks too.
I use via unichrome driver for hw accellerated mpg2 playback and cpu 
utilization is around 20 %.
The only problem I noticed regards Live Tv: for 20 30 seconds the output 
is perfect, audio and video are perfectly syncronized, then for  1-2 
seconds Myth drops frames and audio becomes choppy to become perfect 
again for other 20-30 seconds and this strange beheaviour repeats for as 
long as I watch Live TV CPU utilization is around 30 40 % (res 720x 576).
My hdd settings are :


 /dev/hdc:
 multcount    = 16 (on)
 IO_support   =  3 (32-bit w/sync)
 unmaskirq    =  1 (on)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    = 256 (on)
 geometry     = 24792/255/63, sectors = 398297088, start = 0

I added this line to /etc/sysctl.conf
vm/min_free_kbytes=131072

to always leave some memory free.


I don't know what to anymore.

Big big thanks to anyone answering.