[mythtv] backend crash on dvb channel change, backtrace included

[Brian May]

>>>>> "Tuomas" == Tuomas Jormola <tjormola at cc.hut.fi> writes:

    Tuomas> On 3.5.2004, at 12:46, Brian May wrote:
    >> 
    >> I get the impression I may be dealing with multiple problems here, it
    >> doesn't make it easy to debug. Some problems are specific to the

    Tuomas> Yes, I reported about weird DVB problems on the
    Tuomas> mythtv-users list but received no replies. mythbackend
    Tuomas> doesn't segfault here as in Juha's case but problems exist
    Tuomas> when changing channels nevertheless.

(anyone else had occasional hangs when trying to delete recordings
and/or found that the delete recording option doesn't work, no errors,
without restarting the front end?)

Last night I got reports that mythtv crashed after changing channel to
a "channel that doesn't correspond with any known channel available
here". I am guessing that he got one of the extra channels available
for DVB, not available for analog, but not sure.

Anyway, the logs say:

Audiostream: Layer: 1  BRate: 192 kb/s  Freq: 32.0 kHz
Videostream: ASPECT: 16:9  Size = 720x576  FRate: 25 fps  BRate: 10.00 Mbit/s
2004-05-04 23:33:34 DVB#0 WARNING - Status: NO LOCK!
2004-05-04 23:33:39 DVB#0 ERROR - Poll timed out too many times, bailing.
2004-05-04 23:33:39 DVB#0 ERROR - Tuning for channel #10 failed.
2004-05-04 23:33:39 DVB#0 WARNING - Uncorrectable error in packet, dropped.
2004-05-04 23:33:39 DVB#0 WARNING - Uncorrectable error in packet, dropped.
2004-05-04 23:33:39 DVB#0 WARNING - Uncorrectable error in packet, dropped.
2004-05-04 23:33:39 DVB#0 WARNING - Uncorrectable error in packet, dropped.
2004-05-04 23:33:40 DVB#0 WARNING - No data from card in 1 second.
2004-05-04 23:33:41 DVB#0 WARNING - No data from card in 1 second.
2004-05-04 23:33:42 DVB#0 WARNING - No data from card in 1 second.

...this continued all night until I restarted the backend:

2004-05-05 08:07:26 DVB#0 WARNING - No data from card in 1 second.
2004-05-05 08:07:27 DVB#0 WARNING - No data from card in 1 second.
2004-05-05 08:07:28 DVB#0 WARNING - No data from card in 1 second.
2004-05-05 08:07:29 DVB#0 WARNING - No data from card in 1 second.
2004-05-05 08:07:30 DVB#0 WARNING - No data from card in 1 second.
2004-05-05 08:07:31 DVB#0 WARNING - No data from card in 1 second.

This immediately had me puzzled too, it normally uses the analog card
(PVR350) as first preference for live TV, but here it is using DVB??

Today after restarting the front-end, the above warnings were still
being logged. I restarted the back-end too, and tried viewing live
TV. It stopped at a black screen, with the following error on the
backend:

2004-05-05 08:15:19 MainServer::HandleAnnounce Playback
2004-05-05 08:15:19 adding: snoopy as a client (events: 0)
2004-05-05 08:15:19 Getting next free recorder : -1
2004-05-05 08:15:19 MainServer::HandleAnnounce Playback
2004-05-05 08:15:19 adding: snoopy as a client (events: 1)
2004-05-05 08:15:19 MainServer::HandleAnnounce Playback
2004-05-05 08:15:19 adding: snoopy as a client (events: 0)
2004-05-05 08:15:19 MainServer::HandleAnnounce Playback
2004-05-05 08:15:19 adding: snoopy as a client (events: 0)
2004-05-05 08:15:19 adding: snoopy as a remote ringbuffer
2004-05-05 08:15:19 Changing from None to WatchingLiveTV
2004-05-05 08:15:35 Couldn't read data from the capture card in 15 seconds.  Game over, man.
2004-05-05 08:15:40 Changing from WatchingLiveTV to None
error reading from: /dev/video0
read: Input/output error

so it would appear that the analog card has died until the next
reboot. No doubt a different problem...
-- 
Brian May <bam at snoopy.apana.org.au>