Hi Anders,
I tried creating an .alsoftrc file and saving alsoftrc.sample file provided
in Openal package as "alsoft.conf". Though creating alsoft.conf didn't have any
effect but creating .alsoftrc file made thing worse. I couldn't even run a
single instance of FlightGear. This ia what I get: -
Audio initialization failed!
There was an error opening the ALC device
Oops AL error after audio initialization!
OpenAL error (AL_ILLEGAL_COMMAND): constructor (alGenBuffers)
Fatal error: Failed to gen OpenAL buffer.
As you can see, it doesn't even check /dev/dsp file.
removing .alsoftrc file again sets things back to the way they were earlier.
Openal uses oss and can run one instance only.
Do I need to configure alsa somehow? This is what alsa portion looks in the
alsoft.conf file: -
##
## ALSA backend stuff
##
[alsa]
## device:
# Sets the device name for the default playback device.
#device = default
## capture:
# Sets the device name for the default capture device.
#capture = default
I tried the following things in the .alsoftrc file:-
[general]
drivers=alsa
and the one that you sent:
format = AL_FORMAT_STEREO16
cf_level = 2
drivers = alsa
[alsa] # ALSA backend stuff
device = plug:dmix
capture = plug:dsnoop
I don't know but this may help: -
$ locate dmix
/etc/alsa/pcm/dmix.conf
$ locate dsnoop
/etc/alsa/pcm/dsnoop.conf
Thanks.
Ekhlas.
On Tue, 16 Feb 2010 01:55:41 +0530 wrote
>On Mon, 15 Feb 2010, Ekhlas Sonu wrote:
> Hi,
>
> I have been trying to run multiple instances of Flightgear from my
> computer (RHEL-5 64 bit). I need to do that for my research. However,
> only one instance of Flightgear runs while the other crashes giving this
> error:
>
> I think the first instance of Flightgear is occupying audio resources
> and not willing to share it as when one instance of FG is running, no
> other audio function works. Can anyone tell me how to solve this
> problem?
Yes, you have identified the problem correctly.
It appears that, for some reason, your OpenAL library is configured to use
OSS (the very old Linux sound system) which usually only allowed one
sound application at a time (though a few cards could support a /dev/dsp1
too).
However, since we are not still in the 1990s your system probably have a
more capable sound system available, perhaps Alsa.
If you have Alsa and OpenAL-soft you can put the following in your
.alsoftrc file to configure it to use Alsa:
and...@sleipner:~$ cat .alsoftrc
format = AL_FORMAT_STEREO16
cf_level = 2
drivers = alsa
[alsa] # ALSA backend stuff
device = plug:dmix
capture = plug:dsnoop
See also /etc/openal/alsoft.conf (if you have that file).
If you have the other OpenAL library (Creative's old reference
implementation) the file to create is .openalrc and it
has a different syntax which I have forgotten.
Cheers,
Anders
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WWW: http://www.gidenstam.org/FlightGear/
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