[AG-TECH] Dropping OSS device in Rat (Linux)

monika.k.rabarison at jsums.edu monika.k.rabarison at jsums.edu
Wed Oct 31 08:45:30 CDT 2007


Hello,

I don't get the issue either
I also have ALSA as default on Fedora 7. Both ALSA and OSS work fine.

However, what currently bothering me is that on one of the nodes anytime I
change venue, "Line" switches to "Mic".

-Monika

> Hi Jason,
>
> I don't get this issue luckily, my OSS device is always there alongside
> the ALSA one. I use the ALSA as default. I'm running FC7.
>
> But I do see a similar issue when starting the video producer service, and
> it can take 10 seconds for it to recognise my video device (I just get a
> blank in the drop down device menu). I'm sure other people have seen this
> too.
>
> I would image getting vic to sleep for 10 seconds before starting would
> resolve this, in a similar way to how your shell script makes rat wait a
> bit longer before starting (I assume that's what it's doing).
>
> Cheers, Ben.
>
> |=============================|
> | Ben Green                   |
> | Access Grid Support Centre  |
> | Room G49-H                  |
> | Research Computing Services |
> | Kilburn Building            |
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> |=============================|
> -----Original Message-----
> From: owner-ag-tech at mcs.anl.gov [mailto:owner-ag-tech at mcs.anl.gov] On
> Behalf Of Jason Bell
> Sent: 31 October 2007 05:56
> To: ag-tech; accessgrid-l at clix.aarnet.edu.au
> Subject: [AG-TECH] Dropping OSS device in Rat (Linux)
>
> G'day all
>
> This is just a quick email to see if anyone else has been experiencing
> an issue that I have been having lately.
>
> Basically on my "Linux" systems (Fedora Core 6 and Fedora 7), sometimes
> when Rat is started, the Device "OSS" device is missing in which is then
> defaulted to an "ALSA" device.
>
> The reason why this is an issue is the "OSS" device produces far
> superior audio quality, when compared to "ALSA" (Though I realize that
> "OSS" is just a wrapper on ASLA with the default Fedora Kernel).
>
> From my understanding, the reason why this occurs is that, if the OSS
> device is in use, it then becomes unavailable and no longer displayed as
> a device, as OSS only allows one application exclusive access.
>
> Anyway, from doing some basic testing, it was seen that events like
> switching from one venue to another was causing this to happen.  It
> appeared that if the machine was heavily loaded, this would increase the
> chance of this happening.
>
> Anyway, to cut a long story short, I deleted the /usr/bin/rat sym link
> and replaced it with a basic shell script:
>
> 	#! /bin/sh
>
> 	sleep 5
> 	exec /usr/bin/rat-4.4.00 "$@"
>
> From some initial testing, it appears to have fixed the issue!  (More
> testing is required)
>
> I'm just wondering if anyone else has experienced this issue with Fedora
> or other Linux systems???
>
> Thanks for your time,
> Jason.
>
>
> --------------------------------------------
> Jason Bell, B.I.T.
>
> B. Info. Tech. (Honours) Student
>
> High Performance Computing Support Officer,
> Network Engineer
> Information Technology Division
> Central Queensland University
>
> E-mail : j.bell at cqu.edu.au
> Phone : 07 4930 9229
> --------------------------------------------
> Patience is a virtue.
>
> But if I wanted Patience,
> I would have become a Doctor.
> --------------------------------------------
>
>
>





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