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Old 04-14-2014, 03:50 PM   #1
mr.b-o-b
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Raspberry Pi - Howto keep sound after reboot


I am using Slackwarearm-14.1 on a model B Pi. I am curious how I can make the sound card setting permanent after a reboot.

Each time I restart the Pi, I need to

modprobe snd_bcm2835

to get the sound back online, and then alsamixer & alsactl store to save to volumes.

Is there a way to make the modprobe snd_bcm2835 permanent?

Any advice on this would be greatly appreciated.

Thanks!

Mr. B-o-B
 
Old 04-14-2014, 03:52 PM   #2
schneidz
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there probably is a cleaner way but maybe you can put those commands in /etc/rc.local.
 
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Old 04-14-2014, 05:35 PM   #3
mr.b-o-b
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Agreed. I put everything I need into the rc.local. Works great.


Thank You!
 
Old 04-15-2014, 04:56 AM   #4
DarkVenger
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You just need to create a *.conf file under /etc/modules-load.d/ with the name of the module you want loaded.
For example
Code:
/etc/modules-load.d/sound.conf

# Load snd_bcm2835.ko at boot
snd_bcm2835
See man modules-load.d(5) for more details.
 
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Old 04-15-2014, 07:57 AM   #5
mr.b-o-b
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Perfect. I'll give that a try.

Thank You!
 
Old 04-15-2014, 11:23 AM   #6
DarkVenger
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Thumbs up

Quote:
Originally Posted by mr.b-o-b View Post
Perfect. I'll give that a try.

Thank You!
No problem, please do share if it works for you.
 
Old 04-16-2014, 07:21 AM   #7
louigi600
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Quote:
Originally Posted by DarkVenger View Post
You just need to create a *.conf file under /etc/modules-load.d/ with the name of the module you want loaded.
For example
Code:
/etc/modules-load.d/sound.conf

# Load snd_bcm2835.ko at boot
snd_bcm2835
See man modules-load.d(5) for more details.
According to the modprobe.d man page that's not the correct syntax ... I favor doing that sort of thing by adding the modules I need directly in /etc/rc.d/rc.modules (which may be a link to a similar file with the kernel version in the name) ... so I can't tell you off hand if it will work anyway.
If you want to go the /etc/rc.d/rc.modules way just do this:
Code:
echo "/sbin/modprobe snd_bcm2835" >> /etc/rc.d/rc.modules
As for the volume levels to get some sound out of the device after boot I do that by dumping the state of the working device and using that to generate a command to pass to amixer via rc.local. I don't have the laptop that needs that to show an example ... but if you need that I can show you once I get back home.
 
  


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