RE: Midisport 2x2 spawns before Alsa, taking thedevice0 slot event though modules.conf puts snd-usb-midi as 3rd device ->result potential hardlocks when opening dsp

["Ivica Bukvic" <ico@fuse.net>]

Thank you very much for your assistance!

Ico

> -----Original Message-----
> From: Fernando Pablo Lopez-Lezcano [mailto:nando@ccrma.Stanford.EDU]
> Sent: Tuesday, February 25, 2003 8:56 PM
> To: Ivica Bukvic
> Cc: alsa-devel@lists.sourceforge.net; alsa-user@lists.sourceforge.net
> Subject: Re: [Alsa-devel] Midisport 2x2 spawns before Alsa, taking
> thedevice0 slot event though modules.conf puts snd-usb-midi as 3rd
device
> ->result potential hardlocks when opening dsp
> 
> > I was just wondering how can I force snd-usb-midi to assume device 2
> > slot, rather than the default 0 when spawning, since at boot time on
my
> > machine USB gets initialized before alsa and therefore if I have
> > Midisport 2x2 hooked up, it ends up being my default /dev/dsp device
> > (which actually does not exist) and that makes apps like pd hardlock
my
> > machine if trying to access them.
> >
> > So my question is twofold:
> >
> > 1) Is there anything I can configure about my boot process, where
Alsa
> > gets initialized before USB (I am assuming not, since Alsa does not
> > start until someone logs in, please correct me if I am wrong).
> 
> Alsa is started (in the configurations I've seen) as a service and
that
> happens at boot time if the alsasound service is started (how that is
> configured depends on the distro - redhat uses the chkconfig program).
> If sound is only loaded when you are logging in then the alsasound
> script is not being executed on startup.
> 
> You could blacklist the usb audio related modules so that they are
> started latter in the boot process by the alsasound script (just add
> usb-midi, audio and snd-usb-audio to /etc/hotplug/blacklist).
> 
> > 2) Is there anything I can specify in my modules.conf or elsewhere
in
> > order to force the device to be used as snd-card-2 and not
snd-card-0 (1
> > I would like to reserve for hdsp).
> 
> alias snd-card-1 snd-usb-audio
> alias sound-slot-1 snd-card-1
> 
> and then...
> options snd-usb-audio index=1
> 
> this assumes "cards_limit=2" in "options snd"
> -- Fernando
> 




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