[linux-dvb] problems with more than one dvbs-card

[apieper@gmx.net]

Hi,

since i installed a second dvbs-card in my vdr-pc
i got some problems.

My VDR-PC: Pentium 166 / Intel Chipset (FX?)/ RAM 128MB
VDR 0.72 / Driver 0.82 / Mandrake with kernel 2.2.17
2 Hauppauge DVBs-Cards, 'old' Version, 80GB Maxtor

Problem 1:
Often (60%-70%) if i record with both cards and one 
recording stops vdr is unloaded and my pc reboots 
(the pc is installed to reboot if vdr stops).


Problem 2:
I get messages in the log regarding buffer overflow, example:

Jun  8 20:16:10 VDR vdr[854]: record /mnt/video/vdr.00/Tagesschau/2001-06-08.19.59.10.04.rec
Jun  8 20:16:10 VDR vdr[854]: recording to '/mnt/video/vdr.00/Tagesschau/2001-06-08.19.59.10.04.rec/002.vdr'
Jun  8 20:16:11 VDR vdr[2088]: output thread started (pid=2088)
Jun  8 20:16:11 VDR vdr[2089]: input thread started (pid=2089)
Jun  8 20:16:43 VDR vdr[2089]: buffer usage: 76%
Jun  8 20:16:43 VDR last message repeated 5 times
Jun  8 20:16:43 VDR vdr[2089]: buffer usage: 77%
Jun  8 20:16:43 VDR last message repeated 7 times
Jun  8 20:16:44 VDR vdr[2089]: buffer usage: 78%
Jun  8 20:16:44 VDR last message repeated 6 times
[...]
Jun  8 20:16:52 VDR vdr[2089]: buffer usage: 97%
Jun  8 20:16:52 VDR last message repeated 6 times
Jun  8 20:16:52 VDR vdr[2089]: buffer usage: 98%
Jun  8 20:16:53 VDR last message repeated 7 times
Jun  8 20:16:53 VDR vdr[2089]: buffer usage: 99%
Jun  8 20:16:53 VDR last message repeated 6 times
Jun  8 20:16:53 VDR vdr[2089]: buffer usage: 100%
Jun  8 20:17:04 VDR vdr[854]: buffer stats: 1048575 (100%) used
Jun  8 20:17:04 VDR vdr[854]: timer 3 stop
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

In this example vdr stops here and the pc resets.

Sometimes i get such buffer-usage messages but
vdr is running without problems.

Even with only one dvbs-card i got such messages,
but this never produced such effect.


Problem 3:
Picture distortions (blocks).
If i record with both cards sometimes i get distorted recordings
with blocks in it. Until now i only got this when i recorded
Pro7 and Sat1 together, i tested few other combinations (will 
test more next days) but there where no problems (e.g. ARD and RTL).
With Sat1 and Pro7 i can reproduce the errors, the recordings
are almost unusable.

I guess i have a bottleneck somewhere, how can i
change this ? (faster processor, more ram ?)

...Andreas



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