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Re: ALSA TV tuner problems persist -- no sound :(



On Fri, Jul 13, 2007 at 04:31:45AM +0200, Michael Bonert wrote:
> Hi,
> 
> I'm still struggling with my tv tuner card.

good luck...

> 
> I described the problem here:
> http://lists.debian.org/debian-user/2007/07/msg00340.html
> (ALSA problem - TV tuner no sound)
> 
> The short of the long of it: sound works-- but
> not for the TV tuner.

my apologies if you've already gone over this, but here is what I
see...

> 
> 
> Chris Lane had a few good suggestions:
> http://lists.debian.org/debian-user/2007/07/msg00345.html
> 
> My "/dev/dsp" does exist:
> # ls -lat /dev/dsp
> crw-rw---- 1 root audio 14, 3 2007-07-12 18:25 /dev/dsp

great.

> 
> Also, I tried doing what a reference in Chris' message said (see:
> http://people.debian.org/~terpstra/message/20070705.081707.c4fa712b.en.html ):
> # modprobe snd_pcm_oss
> # modprobe snd_mixer_oss
> # modprobe snd_sec_oss
> FATAL: Module snd_sec_oss not found.
> 
> (I think "snd_sec_oss" should actually be "snd_seq_oss".)

yup, I agree with that...

> 
> 
> # modprobe bt878

here I think is the pertinent snip from previous emails:

btaudio: driver version 0.7 loaded [digital+analog]
btaudio: Bt878 (rev 2) at 01:07.1, irq: 209, latency: 32, mmio:
0xe4001000
btaudio: using card config "default"
btaudio: registered device dsp1 [digital]
btaudio: registered device dsp2 [analog]
btaudio: registered device mixer2
bttv0: unloading
btaudio: driver version 0.7 loaded [digital+analog]
btaudio: Bt878 (rev 2) at 01:07.1, irq: 209, latency: 32, mmio:
0xe4001000
btaudio: using card config "default"
btaudio: registered device dsp1 [digital]
btaudio: registered device dsp2 [analog]
btaudio: registered device mixer2
bttv: driver version 0.9.16 loaded
bttv: using 8 buffers with 2080k (520 pages) each for capture

note that it refences dsp1 and dsp2 

> 
> (Then, I tried launching 'xawtv'. Sound still didn't work.)
> 
> I tried unloading and reloading the bttv and bt878 modules.
> Nope.
> 
> I played with permissions on "/dev/dsp"
> # chmod o=rw /dev/dsp

I don't think that's the problem as its not the right device based on
the above snip. do you have other dsp devices?

ls -l /dev/dsp*


> 
> The above didn't make a difference.
> 
> 
> I tried:
> $ aoss xawtv
> xawtv launched... no sound.

so launch xawtv and then in another terminal try

aplay /dev/dsp1 

and see what that does...

[... snip lots of info about differentr apps that still can't get
sound ...]


> 
> Nothing I did fixed the problem.

I think you're right from your earlier mails, its a kernel/device
level thing and _not_ an application thing. In so much as you're apps
are not looking at the right devices. if that makes sense.

[...]
> 
> I suspect the volume is non-zero based on this:
> $ dump-mixers
> /dev/mixer = EMU10K1 (SigmaTel STAC9708,11)
>   vol        ( 0) :  stereo  rec   94/94
>   bass       ( 1) :  stereo        50/50
>   treble     ( 2) :  stereo        50/50
>   synth      ( 3) :  stereo        100/100
>   pcm        ( 4) :  stereo        50/50
>   speaker    ( 5) :  mono          0
>   line       ( 6) :  stereo  rec   0/0
>   mic        ( 7) :  mono    rec*  0
>   cd         ( 8) :  stereo  rec   0/0
>   pcm2       (10) :  stereo        100/100
>   igain      (12) :  stereo        0/0
>   line1      (14) :  stereo  rec   0/0
>   dig1       (17) :  stereo        0/0
>   phin       (20) :  mono    rec   0
>   phout      (21) :  mono    rec   100
>   video      (22) :  stereo  rec   0/0
> /dev/mixer1 = MPU-401 UART (mixer10)
> 
> Could the problem be related to MPU-401 UART?
> 

possibly.

> 
> # lsmod |grep bt
> snd_bt87x              14500  0
--------------------------------^

note that nothing is trying to use that module. what is this same
output while xawtv is running?

A

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