Since adding a second nova-t pci (909) card I am seeing more frontend crashes. Is there any technique to diagnose the cause ?

I've just started the frontend from an xterm - but it has not crashed yet (typical )

I had thought it was possible due to using the Retro theme - but Ive see it crash a few times since switching back to blue.

Im using a athlon 1.4 with 256mb ram and r5a16.
Crashes seem to occur when im doing something in the ui - like leaving watching a recording.

In addition, take a look at the backend log.

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cesman

When the source is open, the possibilities are endless!

This weeks favorite pages! The first one is the top level page, the second one has more detail for looking at the logs.
http://www.knoppmythwiki.org/index.php?page=TroubleShooting
http://www.knoppmythwiki.org/index.php?page=CheckingLogFiles

ok - it crashed again - at 22:59

looking in mythbackend.log i see

2005-12-05 22:59:27.429 IOBOUND - blocking in ThreadedFileWriter::Write()
2005-12-05 22:59:35.117 Reschedule requested for id 0.
2005-12-05 22:59:35.713 Scheduled 59 items in 0.6 = 0.03 match + 0.56 place

tail .xsession-errors shows
2005-12-05 22:49:12.155 prebuffering pause
2005-12-05 22:49:12.171 prebuffering pause
2005-12-05 22:49:12.187 prebuffering pause
2005-12-05 22:49:12.203 prebuffering pause
2005-12-05 22:49:12.219 prebuffering pause
2005-12-05 22:49:12.235 prebuffering pause
2005-12-05 22:49:12.255 prebuffering pause
2005-12-05 22:59:15.882 Changing from WatchingPreRecorded to None
2005-12-05 22:59:15.937 Changing from None to None
2005-12-05 22:59:25.138 prebuffering pause

nothing much evident there either

tail /var/log/messages
Dec 5 20:08:01 decivo -- MARK --
Dec 5 20:28:02 decivo -- MARK --
Dec 5 20:48:02 decivo -- MARK --
Dec 5 21:08:02 decivo -- MARK --
Dec 5 21:28:03 decivo -- MARK --
Dec 5 21:48:03 decivo -- MARK --
Dec 5 22:08:03 decivo -- MARK --
Dec 5 22:28:04 decivo -- MARK --
Dec 5 22:48:04 decivo -- MARK --
Dec 5 23:08:05 decivo -- MARK --

nothing there either

tail /var/log/syslog

Dec 5 22:17:01 decivo /USR/SBIN/CRON[4202]: (root) CMD ( run-parts --report /etc/cron.hourly)
Dec 5 22:28:04 decivo -- MARK --
Dec 5 22:30:03 decivo kernel: cx88[0]/2: cx8802_restart_queue
Dec 5 22:30:03 decivo kernel: cx88[0]/2: cx8802_restart_queue: queue is empty
Dec 5 22:30:04 decivo kernel: cx88[0]/2: queue is empty - first active
Dec 5 22:30:04 decivo kernel: cx88[0]/2: cx8802_start_dma 752
Dec 5 22:30:04 decivo kernel: cx88[0]/2: setting the interrupt mask
Dec 5 22:30:04 decivo kernel: cx88[0]/2: [c6cfb360/0] cx8802_buf_queue - first active
Dec 5 22:48:04 decivo -- MARK --
Dec 5 23:08:05 decivo -- MARK --


tail /var/log/daemon.log

Dec 5 19:06:51 decivo init: Switching to runlevel: 6
Dec 5 19:06:55 decivo mysqld[2852]: 051205 19:06:55 /usr/sbin/mysqld: Normal shutdown
Dec 5 19:06:55 decivo mysqld[2852]:
Dec 5 19:06:55 decivo mysqld[2852]: 051205 19:06:55 /usr/sbin/mysqld: Shutdown Complete
Dec 5 19:06:55 decivo mysqld[2852]:
Dec 5 19:06:55 decivo mysqld_safe[10309]: ended
Dec 5 19:08:03 decivo mysqld_safe[2868]: started
Dec 5 19:08:04 decivo mysqld[2871]: /usr/sbin/mysqld: ready for connections.
Dec 5 19:08:04 decivo mysqld[2871]: Version: '4.0.22-log' socket: '/var/run/mysqld/mysqld.sock' port: 3306 Source distribution
Dec 5 19:08:04 decivo /etc/mysql/debian-start[2888]: Checking for crashed MySQL tables.


is it the 2005-12-05 22:59:27.429 IOBOUND - blocking in ThreadedFileWriter::Write()
in mythbackend thats causing the crash ?


I also spotted

2005-12-05 22:42:15.319 Realtime priority would require SUID as root.

in .xsession-errors - is this significant ?


is this possibly due to the addition of a second nova-t pci tuner card at the weekend ?


thanks in advance

That or it was caused by the crash.

No.

After fixing my swap problem I am getting IOBOUND errors, too. I only get them when using my pcHDTV HD-3000 as the source tuner for OTA HDTV broadcasts. After a few seconds of live HDTV, I get a lot of stuttering, pixelation and finnaly a freeze. My PVR-150 with DISH Network has no problems. I found this thread on the MythTV mailing list archive. What I got out of it was (1) check to see if your DMA is enabled and (2) it's possible that the recording file writer buffer size may be too small. (See about 2/3 way down on the MythTV mailing list thread referenced above). I looked for the file Chris Pinkham referred to, but it does not seem to be in the same place nor the same file name on Knoppmyth. Does anyone know where the "RingBuffer.cpp" file is? I also found this thread from OpenSubscriber. I'm guessing this is not the same as cache which we can easily adjust in the Knoppmyth Setup GUI. For kicks, here's a sampling from my logs:

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