Alexey Maslennikov posted
<200507090210.07611.alexey.maslennikov@...>, excerpted below, on
Sat, 09 Jul 2005 02:10:02 +0300:
> As far as I remember, /dev/dsp is only used with OSS. In case you use
> ALSA, it is created by OSS emulation. Possibly OSS emulation modules are
> not loaded. Module names are something like snd_*_oss.
> P.S. I can be very wrong about it.
(Without looking,) I believe you're quite right, actually, tho I never
track exactly which devices are ALSA and which are OSS, so you /might/
have that reversed.
I always run ALSA with OSS emulation in the kernel, so get both. With
Gentoo's default udev configuration, based on devfs, one set is created in
/dev/snd/, the other in /dev/sound/, with symlinks from /dev/ to the
devices in both subdirs as necessary, I just never remember which is OSS
and which is ALSA. If I had to, I'd look it up. The quickest way would
be to check the (commented) /etc/udev/rules.d/* file(s). The ALSA section
there is presented separately from the OSS section, so looking at that,
it's easy to figure out which is which.
As to whether they exist or not at any particular moment, that will depend
on several possible configuration details, such as whether you've compiled
the drivers as modules or built-in, and whether you have the alsa or
coldplug (or oss, for those not running alsa) initscripts set to run in
your current runlevel (also on whether you have the init set to use the
tarball or not, I have that turned off and the only devices in my static
/dev are /dev/null and /dev/console, if udev fails, so I'd know it
pretty fast!). Here, I don't run alsa at bootup, but I do run coldplug as
part of initlevel 2 (nonet, my default) and 3 (normal default). I have
the drivers compiled in, so coldplug triggers udev to load the device
nodes. I never /do/ run the alsa script, as what coldplug does is enough
to have sound in KDE/X, and I don't use it at the console if KDE/X isn't
Duncan - List replies preferred. No HTML msgs.
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