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sammo2828
PostPosted: Sun Mar 06, 2005 6:26 am 
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Joined: Sat Sep 18, 2004 9:07 pm
Posts: 94
I'm having trouble with my Visionplus DVB-T card - it sometimes crashes when changing channels. Then I can't watch TV even after restarting X and mythfrontend. I need to reboot before I can watch TV again.

This is what mythbackend.log looks like when it crashes:
Code:
2005-03-06 21:35:10.104 DVB#0 Signal Lost
2005-03-06 21:35:55.318 DVB#0 DVB signal  0 | snr  0 | ber b7018dee | unc   7a
...
2005-03-06 21:35:56.227 Changing from WatchingLiveTV to None
2005-03-06 21:35:56.518 Closing DVB recorder
2005-03-06 21:35:57.095 DVB#0 DVB signal  0 | snr  0 | ber b7018dee | unc   7a
...
2005-03-06 21:36:19.425 DVB#0 WARNING - Status: NO LOCK!
2005-03-06 21:36:19.428 DVB#0 ERROR - Tuning for channel #1 failed.


This is what mythbackend.log looks like when channel change is SUCCESSFUL:
Code:
2005-03-06 21:42:06.610 DVB#0 DVB SI Table Parser Started
2005-03-06 21:42:06.616 DVB#0 Using DVB card 0, with frontend DST TERR.
2005-03-06 21:42:06.619 DVB#0 DVB Signal Monitor Starting
2005-03-06 21:42:06.621 DVB#0 WARNING - Unsupported code_rate_hp option.
2005-03-06 21:42:06.624 DVB#0 WARNING - Unsupported code_rate_lp parameter.
2005-03-06 21:42:06.625 DVB#0 WARNING - Unsupported constellation parameter.
2005-03-06 21:42:07.125 DVB#0 Signal Locked
2005-03-06 21:42:07.620 DVB#0 DVB signal 5200 | snr 6200 | ber    9 | unc    1
2005-03-06 21:42:07.622 DVB#0 Status: LOCK.
2005-03-06 21:42:07.623 DVB#0 Multiplex Locked
2005-03-06 21:42:08.970 DVB#0 Successfully tuned to channel 3.
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dawas
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PostPosted: Fri Mar 18, 2005 9:32 am 
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Joined: Thu Feb 03, 2005 1:01 pm
Posts: 35
Location: Germany, Wuppertal
it could be that the channelsignal is to weak, i have a similar proplem but only with 3 channels.
If it is the weak signal, try an other antenna
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Grooby
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PostPosted: Fri Mar 18, 2005 3:02 pm 
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Joined: Fri Feb 27, 2004 10:58 pm
Posts: 129
like what Dawas said, I think it's definitely signal strength. I have similiar problems with my HD3K at signal of 70%. Sometimes it would work and sometimes my whole frontend dies. At the end, I move my antenna from 2nd floor to the third floor and point at the right direction and now everything works great.
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sammo2828
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PostPosted: Fri Mar 18, 2005 6:02 pm 
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Joined: Sat Sep 18, 2004 9:07 pm
Posts: 94
Okay, it does seem to be related to poor/weak reception ..

Still, it shouldn't crash mythtv! I wonder if the latest cvs is less sensitive to bad reception ..

If anybody knows, please post it .. otherwise, i'll post it when i try it (when i have time) :)
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Girkers
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PostPosted: Fri Sep 02, 2005 10:32 pm 
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Joined: Tue Mar 22, 2005 9:18 pm
Posts: 1422
Location: Brisbane, Queensland, Australia
Sorry to drag up old news, but I am getting this problem when I am trying to record a show, from Mythbackup.log:-
Code:
2005-09-02 20:29:31.519 DVB#0 WARNING - Unsupported code_rate_hp option.
2005-09-02 20:29:31.527 DVB#0 WARNING - Unsupported code_rate_lp parameter.
2005-09-02 20:29:31.529 DVB#0 WARNING - Unsupported constellation parameter.


The log then contains a lot of other errors and then does not lock on the channel. The problem is though I can watch TV fine. Admittedly when I install KnoppMyth I only have a signal strength of 30%, but as I said, I can watch TV fine.

Anyone got any pointers, or sammo how did you go?

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Girkers
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sammo2828
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PostPosted: Fri Sep 02, 2005 10:58 pm 
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Joined: Sat Sep 18, 2004 9:07 pm
Posts: 94
Hi Girkers,

I still get the occasional lock-up while changing channels.

Although now I don't need to reboot - There is something in mythtv-setup to open DVB cards only when required ... turning that on seemed to help ...
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Girkers
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PostPosted: Mon Sep 05, 2005 4:33 pm 
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Joined: Tue Mar 22, 2005 9:18 pm
Posts: 1422
Location: Brisbane, Queensland, Australia
I have set this and you are right it is important, I may have to look at my signal strength.

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