[mythtv-users] No sound after upgrade to FC5

[Dave]

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)
1: Brooktree Bt878 (Alsa Mixer)
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.

>> 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