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tbsdtv / linux_media

TBS linux open source drivers
https://github.com/tbsdtv/linux_media/wiki
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tbs6909x Tuning of channel fails depending on last channel tuned #174

Open tvhdeeptho opened 4 years ago

tvhdeeptho commented 4 years ago

Tuning to "The voice" 30.0E, 12271H Qpks symrate 30000 always fails if the previous channel tuned was BNT3, 33.0E 12646H DVB-S2 PLS: Root+218997, stream 3

My setup: tbs6909x, all tuners except one disabled. The tuner is connected to a 16-poisition switch which is connected to various satellite. Driver version: 17587ba554c68dff58d48f20669a7b37d7551547 Experiments done with tvheadend.

After I have tuned to BNT3 and then to The "Voice", there is no picture. Stopping "The voice" in tvheadend and trying to retune has no effect. The problem can usually be fixed by tuning to some other channel, specifically "TF1", 33.0E, 12597V DVB-S2X 8PSKm symrate 10058.

The kernel reports that the tuner fails to lock (search algorithm failed)

So to summarize: tune to the voice /39E: picture OK tune to BNT3:/33E picture OK tune to the voice/39E: no picture stop/restart "the voice": no picture tune TF1/33E: picture OK tune the voice/39E: picture OK This is perfectly reproducible.

The same problem occurs if instead of the VOICE I use "folklor tv", 39.E, 12214V, QKSK 30000

Thinking that it might be QPSK related, I tried a few QPSK transponders on 282E to see if the have also the problem (first tune bnt3; then the channel on 28.2E; picture always ok) , but could not create the problem with those.

Thinking that it might be multistream related, I also tried the following: tune to multistream on 5W; tune to the voice. In this case picture was always ok on the voide.

I do not think this is a diseqc problem, because I can reproduce the same problem with another switch connected to another tuner.

The LNB is fine. It is only a few weeks old and it works perfectly. I also verified that when the problem occurs, the LNB voltage = 18.2 Volt, which also shows that the hardware is ok.

crazycat69 commented 4 years ago

check kernel log on tuning this DVB-S2/QPSK transponders, some like this

05.08.19 01:20 i2c i2c-0 delivery_system=6 modulation=9 frequency=1741000 symbol_rate=30000000 inversion=2 stream_id=296 05.08.19 01:20 i2c i2c-0 stid135_set_parameters: set pls_mode 0, pls_code 1 ! 05.08.19 01:20 i2c i2c-0 stid135_set_parameters: locked ! 05.08.19 01:20 i2c i2c-0 stid135_set_parameters: set ISI 40 !

tvhdeeptho commented 4 years ago

Here are the logs (with some extra added debug output). The logs show that simply tuning fails.

The voice - OK

Aug 4 23:31:43 streacom kernel: [100093.785627] i2c i2c-5: delivery_system=5 modulation=0 frequency=1671000 symbol_rate=30000000 inversion=2 stream_id=-1 Aug 4 23:31:43 streacom kernel: [100093.787807] i2c i2c-5: stid135_set_parameters: set pls_mode 0, pls_code 1 ! Aug 4 23:31:43 streacom kernel: [100093.914453] i2c i2c-5: stid135_set_parameters: RESULT locked=1 freq=1670360 srate=29998703 standard=0 pr=6 mod=0! Aug 4 23:31:43 streacom kernel: [100093.914455] i2c i2c-5: stid135_set_parameters: locked ! Aug 4 23:31:43 streacom kernel: [100093.914456] i2c i2c-5: stid135_set_parameters: disable ISI filtering !

BNT3 OK

Aug 4 23:32:05 streacom kernel: [100115.726979] i2c i2c-5: delivery_system=6 modulation=9 frequency=2046000 symbol_rate=13910000 inversion=2 stream_id=56063235 Aug 4 23:32:05 streacom kernel: [100115.728934] i2c i2c-5: stid135_set_parameters: set pls_mode 0, pls_code 218997 ! Aug 4 23:32:05 streacom kernel: [100115.920222] i2c i2c-5: stid135_set_parameters: RESULT locked=1 freq=2045441 srate=13916807 standard=1 pr=1 mod=0! Aug 4 23:32:05 streacom kernel: [100115.920230] i2c i2c-5: stid135_set_parameters: locked ! Aug 4 23:32:05 streacom kernel: [100115.920234] i2c i2c-5: stid135_set_parameters: set ISI 3 ! Aug 4 23:32:06 streacom kernel: [100116.120644] tbsecp3_dma_tasklet: 57 callbacks suppressed

The voice - NOT OK

Aug 4 23:32:12 streacom kernel: [100122.969945] i2c i2c-5: delivery_system=5 modulation=0 frequency=1671000 symbol_rate=30000000 inversion=2 stream_id=-1 Aug 4 23:32:12 streacom kernel: [100122.972046] i2c i2c-5: stid135_set_parameters: set pls_mode 0, pls_code 1 ! Aug 4 23:32:15 streacom kernel: [100125.483780] i2c i2c-5: stid135_set_parameters: RESULT locked=0 freq=0 srate=0 standard=642 pr=0 mod=0! Aug 4 23:32:15 streacom kernel: [100125.486668] i2c i2c-5: stid135_set_parameters: not locked, band rf_power -37 dBm ! Aug 4 23:32:15 streacom kernel: [100125.486674] i2c i2c-5: stid135_set_parameters: disable ISI filtering !