[linux-dvb] Nova card drops packets, but tuner reports 0 BER & 0 Uncorr blocks

[Steve Brown <sbrown@cortland.com>]

Although the tuner reports a perfect signal, continuity count errors 
occur on the filtered pids. I doubt that the transmitter is actually 
dropping packets. The only other explanations seem to be either 
erroneous reporting from the tuner or the dvr read code dropping packets.

I'm pretty sure that the tuner is correctly reporting.  I experimented 
by misaligning the antenna and noticing that the BER goes up first and 
the uncorr block count later. When the antenna is repositioned, both 
values go back to zero.

The problem is also intermittent. Sometimes there are no cc errors and 
sometimes they return. In both cases, the tuner reports a perfect 
signal. Also, they are "real errors" as I can see pixelation in the 
decoded output when there are cc errors and none when the cc errors go 
away. The cvs and 0.9.4 drivers behave the same. Finally, it seems 
independent of transponder.

I distilled this down to a 12 line loop in a test program that audits 
the continuity count of selected pids. No errors are reported from the 
dvr read.

Has anybody seen this?

Thanks,

Steve




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