[LAU] Raspberry: problems with shell script launcher when booting

[Jeremy Jongepier]

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On 07/15/2013 02:23 PM, Carlos sanchiavedraz wrote:
> Hi Jeremy,
> 

[...]

>> Hi Carlos,
>> 
>> Try resetting the JACK buffersize with jack_bufsize after
>> starting your program. This does the trick for me on the RPi.
> 
> It seems it did my trick as well, great! For the moment sound seems
> to be as clean as it can until the moment I debug other inner
> noises (it sounds like that of physical hard drives turning, but
> there's none in RPi (?)) when nothing is plugged in the audio
> interface.
> 

What kind of audio interface are you using? You might have to ground
it properly (assunimg you're using an USB interface):
http://sourceforge.net/apps/mediawiki/guitarix/index.php?title=Guitarix_Embedded_/_ARM_SoC#Fighting_the_Noise

[...]

> 
> Now, there's just a minimum issue, but I can live with it.
> Rackarrack runs now as "pi" user and it should take its
> configuration from user's $HOME, that is what it should be
> "/home/pi", but it seems that it doesn't. The difference between
> running the launcher script when logged in as pi is that it takes
> the MIDI mapping configured in preferences, but when launched
> automatically on init phase it takes the default MIDI mapping.
> 
> I run the launcher script from the service script with: su -l -c
> $STARTPATH/launcherscript.sh pi
> 
> ...and "-l" should load the pi environment (I checked it when 
> debugging). Maybe is something specific with Rakarrack.
> 
> Thanks so much, Jeremy.
> 

I'm using 'su -l pi -c /some/command' myself but the order shouldn't
matter I guess. Otherwise you could take a look at start-stop-daemon.
Examples can be found in /etc/init.d/skeleton

Jeremy
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