On Tuesday 07 June 2005 13:01, Sebastian Frei wrote: > 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. Not sure if thats the same thing - I tune a card once and then leave it for months (when it works that is :). However if the patch I'm testing fixes my problem, I'll send it on to you before committing it to see if it helps.
