[mythtv-users] rebuffering and live tv

[Vinton Coffman]

This may be a hardware issue that I'm trying to chase down.  I have a 
Athlon 2500 and PVR-250 running RH9 with kernel 2.4.21rc2 that seems to 
lock up completely with the FSB set to 166 MHz and doesn't crash with 
FSB at 133 MHz.  Memory bus is 333 MHz with PC2700 dimms speed set by 
SPD in bios in both cases.  With the FSB at 133 things don't lock up 
but my audio starts stuttering and video freezes.  It usually recovers 
after a few seconds or up to a minute.  This happens at random 
intervals and duration.

When I check the output of mythfrontend I get the messages shown below. 
  I have an 120 GB ata100 seagate drive and hdparm reports dma is on.  
Top reports mythfrontend is only using 17% of the CPU.  The ringbuffer 
was set to 6GB but I can't seem to find this setting since the setup 
menus changed.  Did I just overlook it or is not accessible from the 
new menus yet?

The pvr-250 is still using the default settings for audio and video.

I included the piece of code that generates the rebuffering message.  I 
couldn't figure out what the variable ateof represented.  Can someone 
explain what this code does?  It might help me figure out what's going.

TIA

rebuffering (139265 256000)
rebuffering (144385 256000)
rebuffering (149505 256000)

 >>>>>>>>>   The message below doesn't always show up
Changing from None to WatchingLiveTV
Over/underscanning. V: 0.000000, H: 0.000000, XOff: 0, YOff: 0
Using XV port 105
 >>>>>>>>>>

Delaying to next trigger: 316423
Delaying to next trigger: 267058
Delaying to next trigger: 209758
rebuffering (133121 256000)
rebuffering (133121 256000)


 >>>> output from hdparm
[root at localhost mythtv]# /sbin/hdparm -d /dev/hda

/dev/hda:
  using_dma    =  1 (on)


 >>>>> from mythfrontend
         if (ateof)
         {
             readsallowed = true;
             totfree = 0;
         }

         if (!readsallowed && used >= fill_threshold)
             readsallowed = true;

         if (readsallowed && used < fill_min && !ateof)
         {
             readsallowed = false;
             cerr << "rebuffering (" << used << " " << fill_min << ")\n";
         }

 >>>>>>>>>>