[mythtv] DVB failure followed by segmentation fault

[Brian May]

On Sat, Apr 10, 2004 at 10:00:08AM +0100, Ed Wildgoose wrote:
> Whilst it should certainly not segfault, it appears that the problem is 
> due to the channel info not being properly setup for that channel.  Can 
> you try firing up livetv and switching to whichever channel shows The 
> Simpsons, and see if it plays.  If it still dies then check your tuning 
> params for this channel.  I wonder if you have the wrong pids / no pids set?

It doesn't work. Problem with channel 10??? Or maybe this is some bad
state left over from the last crash?

2004-04-10 20:15:07 DVB#0 Recorder: Card opened successfully.
Audiostream: Layer: 1  BRate: 448 kb/s  Freq: 32.0 kHz
Videostream: ASPECT: 16:9  Size = 720x576  FRate: 25 fps  BRate: 10.00 Mbit/s
2004-04-10 20:15:12 DVB#0 WARNING - Status: NO LOCK!
2004-04-10 20:15:17 DVB#0 ERROR - Poll timed out too many times, bailing.
2004-04-10 20:15:17 DVB#0 ERROR - Tuning for channel #10 failed.
2004-04-10 20:15:17 DVB#0 WARNING - Uncorrectable error in packet, dropped.
2004-04-10 20:15:17 DVB#0 WARNING - Uncorrectable error in packet, dropped.
2004-04-10 20:15:17 DVB#0 WARNING - Uncorrectable error in packet, dropped.
2004-04-10 20:15:17 DVB#0 WARNING - Uncorrectable error in packet, dropped.
2004-04-10 20:15:17 DVB#0 WARNING - Uncorrectable error in packet, dropped.
2004-04-10 20:15:17 DVB#0 WARNING - Uncorrectable error in packet, dropped.
2004-04-10 20:15:17 DVB#0 WARNING - Uncorrectable error in packet, dropped.
2004-04-10 20:15:18 DVB#0 WARNING - No data from card in 1 second.
2004-04-10 20:15:19 DVB#0 WARNING - No data from card in 1 second.
2004-04-10 20:15:20 DVB#0 WARNING - No data from card in 1 second.
2004-04-10 20:15:21 DVB#0 WARNING - No data from card in 1 second.
2004-04-10 20:15:22 DVB#0 WARNING - No data from card in 1 second.
[...]
2004-04-10 20:15:32 Couldn't read data from the capture card in 15
seconds.  Game over, man.
2004-04-10 20:15:32 Changing from WatchingLiveTV to None
2004-04-10 20:15:32 DVB#0 WARNING - No data from card in 1 second.
2004-04-10 20:15:32 Closing DVB recorder

However, that test didn't crash the backend.

In fact, I can continue watching other DVB channels without any
problems. May DVB devices are still there:

launchpad:~# ls -l /dev/dvb/adapter0/
total 0
crw-rw----    1 root     mythtv   250,   4 Jan  1  1970 demux0
crw-rw----    1 root     mythtv   250,   5 Jan  1  1970 dvr0
crw-rw----    1 root     mythtv   250,   3 Jan  1  1970 frontend0
crw-rw----    1 root     mythtv   250,   7 Jan  1  1970 net0

The crash itself seems to be related to downloading large mpeg files,
via eth0 (samba), does that make any sense???? I had two crashes
tonight, and each time while downloading a file. Coincidence???
I guess I should investigate this more.

My Ethernet card is:

00:04.0 Ethernet controller: Silicon Integrated Systems [SiS] SiS900 10/100 Ethernet (rev 90)

I don't entirely trust it, but it generally seems to work fine,
even after the MythTV backend has crashed.

Later: Channel 10 is now working again via DVB.
-- 
Brian May <bam at snoopy.apana.org.au>