Re: UDEV

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On Thursday 02 August 2007 21:49, Karl Larsen wrote:
> Nigel Henry wrote:
> > On Thursday 02 August 2007 16:21, Karl Larsen wrote:
> >> Andy Green wrote:
> >>> Somebody in the thread at some point said:
> >>>>     I read but did not understand any details of udev but I am certain
> >>>> it is why my old application called gmfsk finds that /dev/dsp is busy.
> >>>> It is not busy but the current setup of udev makes it appear busy.
> >>>> Also it is certain that udev can have upset with the new kernels and
> >>>> be causing the problems some or most of us are having.
> >>>
> >>> What makes you think /dev/dsp isn't busy, and if it is busy, that udev
> >>> is to blame?  Try this
> >>>
> >>> lsof -n | grep /dev/dsp
> >>>
> >>> it should list any processes that have /dev/dsp open.
> >>>
> >>> -Andy
> >>
> >>  I did that and got no result. I think that means it is not busy?
> >>
> >>
> >> --
> >>
> >>  Karl F. Larsen, AKA K5DI
> >>  Linux User
> >>  #450462   http://counter.li.org.
> >
> > Hi Karl. Did you have the gmfsk ham radio app running when you tried the
> > above command? I seem to remember a while back that you said that rx was
> > ok, but you got the /dev/dsp problem when tx'ing.
>
>  Yes that is correct. It does work through the same /dev/dsp on receive
> of course.
>
> > It may be worth trying starting gmfsk with aoss. You need to install the
> > package alsa-oss, then launch the app as.
> > aoss gmfsk
> >
> > That is if gmsfk is the command for launching it.
> >
> > I've just looked at this on one of my 2 machines that does not have a
> > soundcard capable of multiple audio streams. I listen to Internet radio,
> > and start opera with, aoss opera. This way I can use other audio apps at
> > the same time. I ran /usr/sbin/lsof -n | grep /dev/dsp while listening to
> > Internet radio, and just got a return to the command prompt. Btw
> > www.bbc.co.uk/radio4 uses the BBC radio player, that is using RealPlayer
> > (an OSS app).
> >
> > So next I close Opera, and open Firefox, which isn't started using
> > "aoss". Go to www.bbc.co.uk/radio4, click on listen live, and re-run,
> > /usr/sbin/lsof -n | grep /dev/dsp
> >
> > This time I get the following output.
> >
> > $ /usr/sbin/lsof -n | grep /dev/dsp
> > realplay. 29809 djmons    5w   CHR       14,3              360131
> > /dev/dsp
> >
> > Now /dev/dsp is busy, and I know I can't use more audio apps while it's
> > in this state.
> >
> > It's worth giving aoss a try. There's nothing to lose, and if it works,
> > it works.
> >
> > I think you also said that gmfsk was working ok on FC6. Was that on the
> > same machine, with the same soundcard? If so, it is a bit strange that
> > it's not working on F7.
> >
> > There are problems with UDEV, and I've had problems with the ordering of
> > video devices. Thankfully resolved for my Debian installs from help on
> > the Debian list, and hopefully the same fix will work on my FC installs
> > that are using UDEV.
> >
> > All the best.
> >
> > Nigel.
>
> OK I yummed the 2 files and used $ aoss gmfsk and as you expected it
> worked! I will do some learning as to why in the future but thanks for
> the idea. It now runs on F7
>
> --
>
>  Karl F. Larsen, AKA K5DI
>  Linux User
>  #450462   http://counter.li.org.

I'm glad that has resolved the problem for you.

Nigel.

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