[mythtv-users] No sound after upgrade to FC5

[Brad Fuller]

Dave wrote:
> Good afternoon, Brad.  Thank you for your response.
>
> Brad Fuller wrote:
>   
>> Dave wrote:
>>     
>>> Good morning, all.
>>>
>>> Been fighting this for weeks, and am at a loss.  Any ideas?
>>>
>>> Mythtv runs fine on Fedora Core 4.  My drive is dying, so I installed a 
>>> new drive and installed Fedora Core 5 - all other hardware is unchanged. 
>>> Sound on FC5 works fine everywhere except in mythtv and tvtime.  I can 
>>> still (dual) boot into either OS - FC4 works great, and FC5 doesn't have 
>>> sound.  Video works fine on both OSs. If I use mythtv to record a TV 
>>> show and play it on my laptop with mythtv, it works when recorded on 
>>> FC4, but there's no sound when recorded on FC5.
>>>
>>> The sound output of my Hauppauge WinTV goes to line-in on my sound card. 
>>>   I'm assuming that there's something somewhere that is not set to 
>>> capture the line-in from the sound card for mythtv.  "aplay /dev/dsp" 
>>> doesn't produce sound (same with dsp0, dsp1, adsp, adsp0 adsp1).
>>>   
>>>       
>> First, check to see if /dev/dsp actually exists. There are some reported
>> issues that /dev/dsp isn't created correctly by udev (I have this
>> problem on one of my FC5 computers). So, the first thing is to check
>> that /dev/dsp is there if you want to use oss.
>>     
>
> It does exist in /dev...
>
> [dave at dave ~]$ ls -la /dev | grep dsp
> crw-rw----  1 root root    14,  12 Aug  6 13:41 adsp
> crw-rw----  1 root root    14,  28 Aug  6 13:41 adsp1
> crw-------  1 dave root    14,   3 Aug  6 13:41 dsp
> crw-------  1 dave root    14,  19 Aug  6 13:41 dsp1
> [dave at dave ~]$
>
>   
>> However, I suggest that you use alsa instead of oss. FC5 comes with alsa
>> as the default.
>> See if you can play a wave file with alsa:
>>
>> # aplay <a_test_file.wav>
>>     
>
> That works fine - I get good audio with aplay <wavefile.wav>  How do I 
> choose between alsa and oss?  How do I tell which I'm currently using?
>
>   
>> Another place to look is at your mixer. Make sure that the faders are
>> up. Sometimes the default to all the way off.
>>     
>
> That's an area where I get lost.  When I open volume control, I have 
> three devices:
> 0: SiS SI7012 (Alsa Mixer)
>   
I assume this is from an intel onboard audio. Probably is your default.

> 1: Brooktree Bt878 (Alsa Mixer)
>   
I suppose this is from the WinTV card
> 2: C-Media Electronics CMI9738 (OSS Mixer)
>   

> There are a lot of settings there (which I've played with a fair 
> amount), and it's not clear to me which should be turned up, 
> enabled/disabled, speaker & mic mute, etc.
>   
Since you hear with aplay, you could turn all of them down one by one to
see which one is the default.

In any case, the setting at:
Setup>General>Audio
should be set to "ALSA:default" and you'll be set.

>   
>>> I'm not sure what system info is relevant, so will start with just the 
>>> kernel versions:
>>>
>>> 2.6.17-1.2157_FC5  (for Fedora Core 5)
>>> 2.6.13-1.1526_FC4  (for Fedora Core 4)
>>>
>>> Where do I start troubleshooting this?  I'm afraid my "old" drive is 
>>> going to die soon, and won't be able to use mythtv anymore.
>>>
>>> Thanks for any insight!
>>>
>>> Dave
>>>       
>
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