Am Dienstag 07 Juni 2005 13:51 schrieb Andrew de Quincey: > Hi, I've been having (another :) problem with the DVB drivers. Basically, > at certain sites and with certain channels, cards seem to lose the lock > after a while.... the average is about 10 hours, so I think its unlikely to > be that multiswitch incompatability with certain TT DVB-S cards. > > This doesn't affect all sites or all channels or all cards - the same > channels at another site can be rock solid with no issues for months. > > The driver is supposed to launch a zigzag scan if it loses lock. However > this doesn't ever seem to regain the lock with this problem. Simply > restarting our streaming software (without a reboot) however, _does_ regain > the lock (only to lose it again after a while). > > Snooping with dvbsnoop shows that the signal has been lost, but it does > appear to be zigzagging to try and require it, but failing (I see the lock > status varying between SIGNAL and SIGNAL|CARRIER|VITERBI, but never above > that). > > The difference between locking initially and losing a lock after a while > seems to be the call to dvb_frontend_init(). I'm going to try adding a call > to this in to the dvb_frontend_thread() loop if it loses the lock after a > while. > > I'm wondering if anyone else sees this? It seems to plague us constantly. > There does not appear to be any discernable pattern - we have a wide > selection of TT DVB-S card vintages, and it can happen on any one of them, > from cards that were bought 2 or 3 years ago to cards that were bought 2 > months ago. :( > > Does anyone have any ideas as to why it would be happening? The only thing > I can come up with is that the frontends just lose the lock after a bit, so > they need to be retuned to work around it. > > I suppose these cards are really meant as consumer grade ones for zapping > channels, and not really designed for 24x7 reception on a single channel. > > _______________________________________________ > > linux-dvb@xxxxxxxxxxx > http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb Hi, I have very annoying problems with 2 Nova-S-CI (without CI pins, but need budget-ci drivers), maybe related to your problem. After watching tv a while and zapping through different channels, I get an error in vdr: Error: Can't get a lock on device 2 Femon tells the same. Restarting vdr without reloading the drivers cures the problem. If you want me to try any patches, send them to me. S.
