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No audio; two weeks and still unsolved

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digijock223 at yahoo

Sep 25, 2006, 9:29 PM

Post #1 of 9 (2078 views)
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No audio; two weeks and still unsolved

Hi All,

I'm finally at my wits end. I cannot seem to get ALSA audio working
with Myth. After two weeks of searching, experimenting, and googling,
nothing seems to bring forth audio from Myth... However, I have noticed
that I am able to play sounds from the command line (with aplay). I
have set my audio device to "ALSA:default". The mixer is also set to
"default". Help?

-Jeff

2006-09-25 15:50:26.876 Connecting to backend server: 10.223.223.75:6543
(try 1 of 5)
2006-09-25 15:50:26.885 Using protocol version 26
2006-09-25 15:50:26.908 TV: Attempting to change from None to WatchingLiveTV
2006-09-25 15:50:26.917 Using protocol version 26
0: start_time: 0.036 duration: 8589.932
1: start_time: 0.026 duration: 0.004
stream: start_time: 0.289 duration: 95443.795 bitrate=0 kb/s
2006-09-25 15:50:30.207 AFD: Opened codec 0xc27480, id(MPEG2VIDEO)
type(Video)
2006-09-25 15:50:30.232 AFD: Opened codec 0xc25f70, id(MP2) type(Audio)
2006-09-25 15:50:30.247 Opening audio device 'default'.
*2006-09-25 15:50:30.369 mixer unable to find control Master
2006-09-25 15:50:30.369 mixer unable to find control Master
2006-09-25 15:50:30.371 NVP: Disabling Audio, reason is: mixer unable to
find control Master
*X Error: BadMatch (invalid parameter attributes) 8
Major opcode: 141
Minor opcode: 14
Resource id: 0x147
2006-09-25 15:50:31.039 New DB connection, total: 3
2006-09-25 15:50:31.040 TV: Changing from None to WatchingLiveTV
2006-09-25 15:50:31.040 Realtime priority would require SUID as root.
2006-09-25 15:50:31.207 Connected to database 'mythconverg' at host: mango
2006-09-25 15:50:31.312 Video timing method: USleep with busy wait

mtdean at thirdcontact

Sep 26, 2006, 12:51 AM

Post #2 of 9 (2081 views)
Permalink

Re: No audio; two weeks and still unsolved [In reply to]

On 09/26/06 00:29, Jeff Bevis wrote:

> I'm finally at my wits end. I cannot seem to get ALSA audio working
> with Myth. After two weeks of searching, experimenting, and googling,
> nothing seems to bring forth audio from Myth... However, I have
> noticed that I am able to play sounds from the command line (with
> aplay). I have set my audio device to "ALSA:default". The mixer is
> also set to "default". Help?

...

> 2006-09-25 15:50:30.247 Opening audio device 'default'.
> *2006-09-25 15:50:30.369 mixer unable to find control Master
> 2006-09-25 15:50:30.369 mixer unable to find control Master
> 2006-09-25 15:50:30.371 NVP: Disabling Audio, reason is: mixer unable
> to find control Master*

http://www.gossamer-threads.com/lists/mythtv/users/216149#216149

Mike
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mythtv-users mailing list
mythtv-users [at] mythtv
http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users

digijock223 at yahoo

Sep 26, 2006, 9:58 PM

Post #3 of 9 (2055 views)
Permalink

Re: No audio; two weeks and still unsolved [In reply to]

Mike, thanks for your quick response to my plea for help ;-)
Unfortunately, it was a no-go. ""Mixer controls master" yielded:

==============
stream: start_time: 0.289 duration: 95443.795 bitrate=0 kb/s
2006-09-26 21:45:34.643 AFD: Opened codec 0xd02f30, id(MPEG2VIDEO)
type(Video)
2006-09-26 21:45:34.643 AFD: Opened codec 0x12b3b50, id(MP2) type(Audio)
2006-09-26 21:45:34.660 Opening audio device 'default'.
2006-09-26 21:45:34.778 mixer unable to find control Master
2006-09-26 21:45:34.778 mixer unable to find control Master
2006-09-26 21:45:34.779 mixer unable to find control Master
2006-09-26 21:45:34.780 NVP: Disabling Audio, reason is: mixer unable to
find control Master
X Error: BadMatch (invalid parameter attributes) 8
Major opcode: 141
Minor opcode: 14
Resource id: 0x147
2006-09-26 21:45:35.425 TV: Changing from None to WatchingLiveTV
==============

Can't find control "Master" either. No PCM, no Master. What's going on
here? How can I find out what the mixer /does/ have in the way of
controls? This is just an NVidia NForce4 chipset, is there not support
for this (hard to believe)?! Well wait, command line aplay works,
alsamixer too. I'm back to square one. Where do I go from here, start
writing a volume control script? That seems unlikely to be the right
action... My gut is telling me something else is wrong, and I just
don't know where to look.

-Jeff

Michael T. Dean wrote:
> On 09/26/06 00:29, Jeff Bevis wrote:
>
>
>> I'm finally at my wits end. I cannot seem to get ALSA audio working
>> with Myth. After two weeks of searching, experimenting, and googling,
>> nothing seems to bring forth audio from Myth... However, I have
>> noticed that I am able to play sounds from the command line (with
>> aplay). I have set my audio device to "ALSA:default". The mixer is
>> also set to "default". Help?
>>
>
> ...
>
>
>> 2006-09-25 15:50:30.247 Opening audio device 'default'.
>> *2006-09-25 15:50:30.369 mixer unable to find control Master
>> 2006-09-25 15:50:30.369 mixer unable to find control Master
>> 2006-09-25 15:50:30.371 NVP: Disabling Audio, reason is: mixer unable
>> to find control Master*
>>
>
> http://www.gossamer-threads.com/lists/mythtv/users/216149#216149
>
> Mike
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>
>

mtdean at thirdcontact

Sep 26, 2006, 10:41 PM

Post #4 of 9 (2064 views)
Permalink

Re: No audio; two weeks and still unsolved [In reply to]

On 09/27/06 00:58, Jeff Bevis wrote:

> Michael T. Dean wrote:
>
>>On 09/26/06 00:29, Jeff Bevis wrote:
>>
>>>I'm finally at my wits end. I cannot seem to get ALSA audio working
>>>with Myth. After two weeks of searching, experimenting, and googling,
>>>nothing seems to bring forth audio from Myth... However, I have
>>>noticed that I am able to play sounds from the command line (with
>>>aplay). I have set my audio device to "ALSA:default". The mixer is
>>>also set to "default". Help?
>>>
>>...
>>
>>>2006-09-25 15:50:30.247 Opening audio device 'default'.
>>>*2006-09-25 15:50:30.369 mixer unable to find control Master
>>>2006-09-25 15:50:30.369 mixer unable to find control Master
>>>2006-09-25 15:50:30.371 NVP: Disabling Audio, reason is: mixer unable
>>>to find control Master*
>>>
>>http://www.gossamer-threads.com/lists/mythtv/users/216149#216149
>>
> ... Can't find control "Master" either. No PCM, no Master. ...

So, you need to use a script like the one in the post I linked to
(probably just use that one and customize as described in the
comments). You can find out what controls are available with:

amixer scontrols

Mike
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mythtv-users mailing list
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http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users

sam at hellosam

Sep 26, 2006, 10:51 PM

Post #5 of 9 (2064 views)
Permalink

Re: No audio; two weeks and still unsolved [In reply to]

Jeff Bevis wrote:

> Hi All,
>
> I'm finally at my wits end. I cannot seem to get ALSA audio working
> with Myth. After two weeks of searching, experimenting, and googling,
> nothing seems to bring forth audio from Myth... However, I have
> noticed that I am able to play sounds from the command line (with
> aplay). I have set my audio device to "ALSA:default". The mixer is
> also set to "default". Help?
>
If it is this one...then it's fixed in v0.20
http://cvs.mythtv.org/trac/ticket/1217

I had the problem with that too, I was using v0.19 and nvdia HDA on
board sound. It forced me to disable internal mixer, the result is I
lost control to the nicam broadcast, which the station broadcasts two
independent langangues over L/R channels.
After upgrading to v0.20, it's fixed and works like a charm. My mixer
device is "ALSA:default".
_______________________________________________
mythtv-users mailing list
mythtv-users [at] mythtv
http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users

digijock223 at yahoo

Sep 27, 2006, 9:36 PM

Post #6 of 9 (2055 views)
Permalink

Re: No audio; two weeks and still unsolved [In reply to]

Interesting! The amixer reports:

======
Simple mixer control 'Headphone',0
Simple mixer control 'PCM',0
Simple mixer control 'Front',0
Simple mixer control 'Front Mic',0
Simple mixer control 'Surround',0
Simple mixer control 'Center',0
Simple mixer control 'LFE',0
Simple mixer control 'Side',0
Simple mixer control 'Line',0
Simple mixer control 'CD',0
Simple mixer control 'Mic',0
Simple mixer control 'IEC958',0
Simple mixer control 'Capture',0
Simple mixer control 'Capture',1
Simple mixer control 'Input Source',0
Simple mixer control 'Input Source',1
======

So, it would appear that I do in fact have a PCM control, and that
should've worked. So I backed up a bit and set the thing up for "mixer
controls PCM" again. Here's what came out (after restarting the software):

======
0: start_time: 0.036 duration: 8589.932
1: start_time: 0.026 duration: 0.004
stream: start_time: 0.289 duration: 95443.795 bitrate=0 kb/s
2006-09-27 21:30:28.691 AFD: Opened codec 0x1994980, id(MPEG2VIDEO)
type(Video)
2006-09-27 21:30:28.691 AFD: Opened codec 0x199bee0, id(MP2) type(Audio)
2006-09-27 21:30:28.708 Opening audio device 'default'.
2006-09-27 21:30:28.824 mixer unable to find control Master
2006-09-27 21:30:28.824 mixer unable to find control Master
2006-09-27 21:30:28.833 NVP: Disabling Audio, reason is: mixer unable to
find control Master
X Error: BadMatch (invalid parameter attributes) 8
Major opcode: 141
Minor opcode: 14
Resource id: 0x147
2006-09-27 21:30:29.683 Realtime priority would require SUID as root.
2006-09-27 21:30:29.683 TV: Changing from None to WatchingLiveTV
2006-09-27 21:30:29.851 Video timing method: USleep with busy wait
======

Still trying to find control "Master" ... which does not appear in my
mixer controls. PCM does, but Master does not. Strange not to have any
Master level control, I would think. But that may be another issue for
later. (or not...)

Anyway, my question has now morphed into "Can you use PCM control
without having a Master control, too." Because if the answer is NO, I
am still hosed and that explains the error message "mixer unable to find
control Master". Back to the script solution in that case.

Since my motherboard is new, and based on NVidia NForce430, I would
expect that a lot of people would be having this same kind of problem.
But this does not appear to be true (is it?). So I am still expecting
to find that I have misconfigured something along the way.

Does the presence of PCM (and not Master) shed any new light on the
situation?
-Jeff

Michael T. Dean wrote:
> On 09/27/06 00:58, Jeff Bevis wrote:
>
>
>> Michael T. Dean wrote:
>>
>>>> 2006-09-25 15:50:30.247 Opening audio device 'default'.
>>>> *2006-09-25 15:50:30.369 mixer unable to find control Master
>>>> 2006-09-25 15:50:30.369 mixer unable to find control Master
>>>> 2006-09-25 15:50:30.371 NVP: Disabling Audio, reason is: mixer unable
>>>> to find control Master*
>>>>
>>>>
>>> http://www.gossamer-threads.com/lists/mythtv/users/216149#216149
>>>
>>>
>> ... Can't find control "Master" either. No PCM, no Master. ...
>>
>
> So, you need to use a script like the one in the post I linked to
> (probably just use that one and customize as described in the
> comments). You can find out what controls are available with:
>
> amixer scontrols
>

digijock223 at yahoo

Sep 27, 2006, 9:39 PM

Post #7 of 9 (2046 views)
Permalink

Re: No audio; two weeks and still unsolved [In reply to]

Hi Sam,

This is very interesting. I just finished posting a followup wherein I
have discovered that I do have a "PCM" control, but not a "Master"...
this would seem to fit the bill. I will try updating to v0.20!!

Thanks,
-Jeff

Sam Wong wrote:
> Jeff Bevis wrote:
>
>
>> Hi All,
>>
>> I'm finally at my wits end. I cannot seem to get ALSA audio working
>> with Myth. After two weeks of searching, experimenting, and googling,
>> nothing seems to bring forth audio from Myth... However, I have
>> noticed that I am able to play sounds from the command line (with
>> aplay). I have set my audio device to "ALSA:default". The mixer is
>> also set to "default". Help?
>>
>>
> If it is this one...then it's fixed in v0.20
> http://cvs.mythtv.org/trac/ticket/1217
>
> I had the problem with that too, I was using v0.19 and nvdia HDA on
> board sound. It forced me to disable internal mixer, the result is I
> lost control to the nicam broadcast, which the station broadcasts two
> independent langangues over L/R channels.
> After upgrading to v0.20, it's fixed and works like a charm. My mixer
> device is "ALSA:default".
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>
>

sam at hellosam

Sep 28, 2006, 12:12 AM

Post #8 of 9 (2029 views)
Permalink

Re: No audio; two weeks and still unsolved [In reply to]

Jeff Bevis wrote:

> Hi Sam,
>
> This is very interesting. I just finished posting a followup wherein
> I have discovered that I do have a "PCM" control, but not a
> "Master"... this would seem to fit the bill. I will try updating to
> v0.20!!
>
ya it looks for both AFAIK. So if you have one of them missing, you are
doomed...

>>If it is this one...then it's fixed in v0.20
>>http://cvs.mythtv.org/trac/ticket/1217
>>
I guess you better try the patch, or simply upgrade to v0.20. it's not a
problem of alsa, soundcard or configuration, but mythtv...
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list-mythtv at bluecamel

Sep 28, 2006, 6:18 AM

Post #9 of 9 (2043 views)
Permalink

Re: No audio; two weeks and still unsolved [In reply to]

On Sep 28, 2006, at 3:12 AM, Sam Wong wrote:

>> This is very interesting. I just finished posting a followup wherein
>> I have discovered that I do have a "PCM" control, but not a
>> "Master"... this would seem to fit the bill. I will try updating to
>> v0.20!!
>>
> ya it looks for both AFAIK. So if you have one of them missing, you
> are
> doomed...

You're not doomed yet! :) My Intel HDA has no Master but does have a
PCM. The message "Cannot find Master" seems to come from changing the
Mixer from /dev/mixer to "default" as the sound HOWTO on the wiki
recommends. Using either /dev/mixer or the name of a valid control,
like PCM, for the Mixer setting should get rid of these messages.

This assumes you are not hooking your sound card to your A/V
equipment. In that case you're most likely bettter off disabling
MythTV volume control and using the A/V receiver to control your volume.

--
Scott

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