[linux-dvb] KNC TV Station DVR Tuner Sound Issue

Frederic CAND frederic.cand at anevia.com
Wed Apr 30 15:24:42 CEST 2008

Frederic CAND a écrit :
> hermann pitton a écrit :
>> Am Dienstag, den 29.04.2008, 14:18 +0200 schrieb Frederic CAND:
>>> hermann pitton a écrit :
>>>> Hi Frederic,
>>>> Am Dienstag, den 29.04.2008, 11:09 +0200 schrieb Frederic CAND:
>>>>> Dear all,
>>>>> I recently had to change v4l drivers to support my WinTV HVR 1300.
>>>>> I have issues making my HVR work but that's not the point here.
>>>>> My problem is that since I updated kernel + drivers, I can't manage to 
>>>>> make sound work when I'm using the tuner input. Sound jack input works 
>>>>> when I'm using SVideo or Composite Video, but not when I'm using tuner.
>>>>> Here are the options I'm using
>>>>> tuner : port2=0
>>>>> saa7134: oss=1 disable_ir=1
>>>>> saa7134-oss: rate=48000
>>>> the rate=48000 is only valid for external analog input and disables
>>>> sound from tuner. Have a look at the saa7134-oss mixer under such
>>>> conditions.
>>>> You must use default rate of 32000 for dma sound from tuner.
>>>> The saa7134-oss is also soon deprecated and replaced by saa7134-alsa.
>>>> If you are considering using recent v4l-dvb mercurial stuff, which
>>>> should be best for the HVR1300 and reporting bugs on saa7134-empress,
>>>> you might still have your old saa7134-oss module around and some others
>>>> like the old video_buf now loaded, since not deleted on upgrade.
>>>> After make rmmod and rminstall with current v4l-dvb you should delete
>>>> such remaining modules on older kernels too before make install.
>>>> Cheers,
>>>> Hermann
>>> hum I used to set rate to 48000 with my old 2005 july snapshot and it 
>>> was working even with tuner ... but ok I'll try 32000
>>> i've tried alsa and I had the same results, that is no sound with tuner 
>>> but line in sound with composite and svideo
>>> do I need some special stuffs compiled in my kernel except from config_snd ?
>>> about old modules still loaded this can't be since I build my system 
>>> from scratch each time i try a new kernel / driver into an ext2 file, 
>>> which I put on a 32MB flash disk and boot on it ... so I'm sure I'm not 
>>> using my old v4l snapshot, but the v4l drivers
>>> I'll let you know if I can make it work
>> Ah, you are in France!
> yeah!
>> Try "modinfo saa7134". Due to unresolvable auto detection issues between
>> different SECAM standards there was a secam= either DK, L or Lc option
>> introduced.
> huhu... but my system has to work worldwide ... so a module option is 
> not a good idea, because it does not only depends on the country, but 
> also if my customer is using a signal modulator or not, ... and I have 
> two cards in my system, and I want to be able to select a certain SECAM 
> mode with the first one, and another mode with the second card
> Actually I'm selecting secam L, DK or BG with an ioctl cause my card can 
> handle them (tested and working with older drivers/kernels)
>> Anything else then 32000Hz sampling rate for TV is wrong currently and
>> you get that input disabled on saa7134-oss mixer. Yes, it was once
>> possible, but not intended, to use 48000 also for TV/Video on saa7134
>> chips, but gave very poor and crackling sound and is wrong.
>> The current saa7134-alsa is simpler to use and also uses an exported
>> mute symbol from saa7134-tvaudio. Default distribution settings are
>> sufficient. On recent Ubutu releases seem to be problems with an out of
>> tree alsa there.
> Ok I'll see with this rate thing and let you know
>> Cheers,
>> Hermann
> Greetings.
I still have nothing with oss and rate=32000, with alsa, or with secam=l
Anyway, some more informations :
* I've got the following error messages on saa7134 module insertion

saa7134_empress: Unknown symbol saa7134_devlist
saa7134_empress: Unknown symbol saa7134_common_ioctl
saa7134_empress: Unknown symbol saa7134_boards
saa7134_empress: Unknown symbol saa7134_ts_register
saa7134_empress: Unknown symbol saa7134_ts_qops
saa7134_empress: Unknown symbol saa7134_i2c_call_clients
saa7134_empress: Unknown symbol saa7134_ts_unregister
saa7134_alsa: Unknown symbol saa7134_tvaudio_setmute
saa7134_alsa: Unknown symbol saa_dsp_writel
saa7134_alsa: Unknown symbol saa7134_devlist
saa7134_alsa: Unknown symbol saa7134_pgtable_alloc
saa7134_alsa: Unknown symbol saa7134_pgtable_build
saa7134_alsa: Unknown symbol saa7134_pgtable_free
saa7134_alsa: Unknown symbol saa7134_dmasound_init
saa7134_alsa: Unknown symbol saa7134_dmasound_exit
saa7134_alsa: Unknown symbol saa7134_set_dmabits
saa7134 ALSA driver for DMA sound loaded
saa7134[0]/alsa: saa7134[0] at 0xe5300000 irq 5 registered as card -1
saa7134[1]/alsa: saa7134[1] at 0xe5301000 irq 9 registered as card -1

* When using audio_debug=1 for saa7134, I've got the following :
saa7134[1]/audio: mute/input: nothing to do [mute=1,input=Television]
saa7134[1]/audio: sound IF not in use, skipping scan
saa7134[1]/audio: mute/input: nothing to do [mute=1,input=Television]
saa7134[1]/audio: mute/input: nothing to do [mute=1,input=Television]
saa7134[1]/audio: ctl_mute=0 automute=0 input=Television  =>  mute=0 
saa7134[1]/audio: sound IF not in use, skipping scan
saa7134[1]/audio: mute/input: nothing to do [mute=0,input=Television]
saa7134[1]/audio: sound IF not in use, skipping scan
saa7134[1]/audio: mute/input: nothing to do [mute=0,input=Television]
saa7134[1]/audio: ctl_mute=0 automute=1 input=Television  =>  mute=1 
saa7134[1]/audio: sound IF not in use, skipping scan
saa7134[1]/audio: ctl_mute=0 automute=0 input=Television  =>  mute=0 

CAND Frederic
Product Manager

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