[Jack-Devel] alsa_* device or resource is busy

[Athanasios Silis]

Lots of good info, thanks.
I will certainly abandon the rc.local approach and try with autostart.
The pc I am refering to above is a jackd client, so the "system* hooks
connect to the jack master, that is why I need to enable the local
soundcards (on the jack client) through alsa_* . I shall change that to
zita_* as well.

yes ubuntu studio uses xfce4 . I shall try KXStudio as well :)


On Fri, Apr 17, 2015 at 2:38 PM, Adrian Knoth <adi at drcomp.erfurt.thur.de>
wrote:

> On 04/17/15 13:16, Athanasios Silis wrote:
>
>  hi all, continuing from a previous email where I try to start up
>> several audio applications from a custom init script , which is run
>> from rc.local,
>>
>
> I originally wanted to point out that the use of rc.local for this stuff
> is discouraged, but you've just discovered this yourself now.
>
> You should really consider your approach and come up with something
> else.
>
>  what could be conflicting here?
>>
>
> Everything. Your login manager is probably using the card.
>
> The whole concept of integrating desktop distros with rc.local for audio
> is not going to fly, because the distros set device permissions based on
> the logged in user.
>
> There might also be a system-wide pulseaudio daemon running, probably as
> root. You might get away with pasuspender -- alsa_out, but I wouldn't be
> surprised if not, unless you wrap your su call in pasuspender.
>
> Also note that you shouldn't be using alsa_in/out at all, use zita-a2j
> and zita-j2a or use jackd-0.124.x where you can simply specify
> additional cards:
>
>    $ jackd -A Intel -d alsa -d hw:DSP24,0
>
> I don't know what you're trying to achieve, but I see mostly two
> options:
>
>   (a) if you don't need a desktop, don't use one.
>   (b) if you do need a desktop, use their autostart features
>
> For (b): You can have auto-login for a certain user. You can have
> autostart for this user. Just run your script from the usual XDG
> directories (or however your distro implements autostart).
>
> Also consider switching to KXstudio - a lot of work went into it to make
> things work. An integration effort other distros never bothered to do.
>
>
> Cheers
>
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