run of alsa-info-sh suceeded.

Nigel Henry cave.dnb2m97pp at
Wed Feb 20 16:27:33 UTC 2008

On Wednesday 20 February 2008 07:41, Ric Moore wrote:
> On Mon, 2008-02-18 at 21:36 +0100, Nigel Henry wrote:
> > Sorry Aaron, this is probably not much help. Personally I'm not clued up
> > about Hal, and Udev. I still have problems with the ordering of video
> > devices with udev, but enough said on that issue, as I use a workaround.
> >
> > Frustrating Eh! Nigel.
> Nigel, I thought we had that /dev/snd device busy issue beaten. It's
> cropped back up and I thought I had the original fix in my email
> archives. I shore would like to see whateverinthehell is set by default,
> to be fixed permanently. I had all kinds of sounds from many apps
> blowing away at once. It was great. Now it's busted again and something
> in the updates for sound services breaks it --every time-- and has since
> way back. I hope that gets fixed so that multiple sources of sounds can
> play at the same time --as the standard-- setup. That would be snazzy.
> Ric

Hi Ric. Which Fedora version are you using? I've got F8, and all the earlier 
ones available, apart from FC4. Just for the hell of it I had a go at running 
a few audio apps at the same time on F8. Just a bit of info though. This 
machine does have an audigy2 soundblaster, which is capable of multiple audio 
streams. Also I did disable pulseaudio which was causing me problems on F8, 
by removing alsa-plugins-pulseaudio, which also removed 
kde-settings-pulseaudio (I use KDE).

Anyway. Xawtv is playing a TV show, The BBC iPlayer, which uses realplayer is 
playing, and running /usr/sbin/lsof -n | grep /dev/dsp shows the following.
[djmons at localhost ~]$ /usr/sbin/lsof -n | grep /dev/dsp
realplay. 19458    djmons   10w      CHR       14,3                
5983 /dev/dsp
[djmons at localhost ~]$

Now I open MhWaveedit, which is set to use Alsa, and play an .ogg file, and 
also open Qjackctl, start jack, and open ZynAddSubFX, and play along with 
the .ogg. So 4 audio apps playing at once.

No bragging going on here Ha Ha Ha. Seriously though, I wonder why your 
getting problems after updates.

IIRC Dmix enters the arena for cards that arn't capable of multiple audio 
streams, and enables you to play more than one app at the same time on more 
recent versions of Fedora. I'm not sure at which Fedora version Dmix was 
setup to just work. I know it isn't on my FC2 install on the other machine 
that has an Ensoniq card (ens1371 driver). On FC2 if I start the BBC iPlayer 
using Firefox, or Opera, realplayer (which uses OSS) grabs /dev/dsp, and no 
other sound apps will work at the same time. If I start Opera as "aoss 
opera" (presuming that you have the alsa-oss package installed), I can run 
other audio apps at the same time. I also have FC5, and 6 on the machine with 
the Ensoniq card, and am sure that at least FC6 has Dmix setup to just work. 
I can't try it out at the mo, because I'm posting from FC2 on the same 

You cannot stop, and start Alsa on recent Fedora versions, but there is a 
command to stop, and start Dmix/Dsnoop, or at least was. I can't find it on 
F8, and forgot to write it down. Perhaps it was on F7. I'll have to look 
through the old emails to find the command.

Just some Wednesday afternoon ramblings on never ending sound problems, but 
they do keep us focused though, or is that focussed. Damn it, both spellings 
look wrong.

All the best Ric.


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