/dev/dsp disappeared after power outage

[Ulrich Spoerlein]

On Mon, 04.02.2008 at 13:00:40 -0700, Bert JW Regeer wrote:
> On Feb 4, 2008, at 08:03 , John Baldwin wrote:
> > On Saturday 02 February 2008 06:40:15 pm Aryeh M. Friedman wrote:
> >> I just had a power outage and when it came back /dev/dsp0.0 was
> >> missing from the devices.   the kern module loaded fine and detected
> >> the card correctly (according to dmesg, sysctl and /dev/sndstat) but
> >> neither the above or /dev/pcm exists.  After rebooting the problem
> >> remains. Any ideas how to fix it?
> > 
> > Nothing to fix.  This is how devfs device cloning works.
> 
> Nothing to fix? The sound card that is correctly detected by the kernel 
> module is not being created in /dev, ONLY after he had a power outage. It is 
> not even coming back when he reboots the machine.
> 
> I don't have any suggestions, I just don't believe "Nothing to fix" is the 
> right answer.

Sigh,

AFAIK dev cloning works by creating the device nodes when open()ed.
Using 'ls /dev/dsp*' will not open() any devices, so nothing is created.
He should use 'ls /dev/dsp0 /dev/dsp0.0' and then the devices should
appear.

Try it for yourself, do 'ls /dev/dsp*' then 'ls /dev/dsp.8'

Not that anything usefull can be done with ls(1) to get sound :)


Cheers,
Ulrich Spoerlein
-- 
It is better to remain silent and be thought a fool,
than to speak, and remove all doubt.