-----Original Message-----
From: Steve Chen [mailto:[email protected]]
Sent: Thursday, June 11, 2009 5:57 PM
To: Santosh Singh
Cc: [email protected]
Subject: Re: Need help for missing sound after some time in /dev/dsp
On Thu, 2009-06-11 at 14:17 +0530, Santosh Singh wrote:
> Hi All,
>
> We are writing small application on TI's DM6446 evaluation board.
>
> I am facing sound related problem i.e., with /dev/dsp.
>
> When we are playing some .wav file using na_play ,I could hear the sound for
> a longer period without any problem.
>
>
>
> But from a C routine when we are executing a shell script using system call()
> to play a .wav file continuously for a period of time in a for loop.
>
> After some time around 2-5 min sound goes off, but shell script is still
> being called by c routine and even after reboot sound doesn't come up.
>
> Finally we have to do a hard reset to reboot the system to correct this sound
> problem.
>
>
>
> I don't find any error messages in dmesg.
>
> Even command fuser -v /dev/dsp shows only my application name.
>
> Sample code:
>
> C routine:
>
>
>
> for (int i=0; i< 1000; i++ )
>
> system ("./na_play tem.wav");
>
> na_play is the player in current directory and
>
> tem.wav is the .wav file to play.
>
> Please help to find out actual problem and solution if possible.
>
>
> Regards,
>
> Santosh
>
A few qustions
1. Which kernel are you using.
2. Can you reproduce the problem playing a long sound file?
I recall reading a bug report sometime ago that start/stop audio
repeatedly can cause audio to stop working which is what you are doing.
Regards,
Steve
Hi Steve,
Thanks for your response.
1. Kernel version is 2.6.10 montavista-linux
2. We are not able to reproduce the problem with long file, only with short
file when playing one after the other. i.e. when I try to run a sample file as
mentioned in my previous mail in a loop I find that the sound goes off after
few minutes.
When I do a soft reboot with "reboot" command and try to play any .wav file I
don't get any sound. I need to do hard reboot to fix this issue.
Thanks in advance.
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