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| DVB-T intermittent crashing when changing channels http://forum.linhes.org/viewtopic.php?f=11&t=3810 |
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| Author: | sammo2828 [ Sun Mar 06, 2005 6:26 am ] |
| Post subject: | DVB-T intermittent crashing when changing channels |
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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| Author: | dawas [ Fri Mar 18, 2005 9:32 am ] |
| Post subject: | |
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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| Author: | Grooby [ Fri Mar 18, 2005 3:02 pm ] |
| Post subject: | |
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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| Author: | sammo2828 [ Fri Mar 18, 2005 6:02 pm ] |
| Post subject: | |
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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| Author: | Girkers [ Fri Sep 02, 2005 10:32 pm ] |
| Post subject: | |
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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| Author: | sammo2828 [ Fri Sep 02, 2005 10:58 pm ] |
| Post subject: | |
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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| Author: | Girkers [ Mon Sep 05, 2005 4:33 pm ] |
| Post subject: | |
I have set this and you are right it is important, I may have to look at my signal strength. |
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