ALSA Debugging

ALSA Debugging

[Vinod Koul]

Hello,
I am new to ALSA and Linux. I was trying to understand the ALSA
architecture.

I have Linux Box with Intel sound card. with Suse 10.1 on it.
I launched the audio player (Real player) and audio plays fine.

Then, I built the kernel and installed it. I put some printk's in intel8x0.cand
control.c. (could see the my code was complied)
Even though I changed volume muted etc couldn't see any of my printk in
dmesg. One default printk in intel8x0.c was there, so I have put my print
before that line as well, but couldn't see anything.

Apologies If my problem is very basic. I read on forums that best way to
learn is to put printk's.

Can anyone help me with where I am doing incorrectly, Am I supposed to do it
this way or some other way?

Thanks in advance
-Vinod

Re: ALSA Debugging

[Tobin Davis]

First, verify that you are working with the correct driver.  lsmod will
tell you which sound drivers are loaded.  If this is a newer system,
you're probably using the snd-hda-intel driver, which is a whole lot
different.

Tobin
On Fri, 2008-03-21 at 20:45 +0530, Vinod Koul wrote:

> Hello,
> I am new to ALSA and Linux. I was trying to understand the ALSA
> architecture.
> 
> I have Linux Box with Intel sound card. with Suse 10.1 on it.
> I launched the audio player (Real player) and audio plays fine.
> 
> Then, I built the kernel and installed it. I put some printk's in intel8x0.cand
> control.c. (could see the my code was complied)
> Even though I changed volume muted etc couldn't see any of my printk in
> dmesg. One default printk in intel8x0.c was there, so I have put my print
> before that line as well, but couldn't see anything.
> 
> Apologies If my problem is very basic. I read on forums that best way to
> learn is to put printk's.
> 
> Can anyone help me with where I am doing incorrectly, Am I supposed to do it
> this way or some other way?
> 
> Thanks in advance
> -Vinod
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel

-- 
Tobin Davis 


The man on tops walks a lonely street; the "chain" of command is often a noose.

Re: ALSA Debugging

[Vinod Koul]

Thanks Tobin,
Checked snd-intel8x0 is loaded.

Did rmmod and tried to insert with my compiled driver from my sources gives
an error: "error inserting 'snd-intel8x0.ko' : -1 Invalid module format"

Checked from Yast, my sound card is 82801G AC'97, driver snd-intel8x0

-Vinod

On Fri, Mar 21, 2008 at 9:45 PM, Tobin Davis <tdavis@dsl-only.net> wrote:

>  First, verify that you are working with the correct driver.  lsmod will
> tell you which sound drivers are loaded.  If this is a newer system, you're
> probably using the snd-hda-intel driver, which is a whole lot different.
>
> Tobin
>
> On Fri, 2008-03-21 at 20:45 +0530, Vinod Koul wrote:
>
> Hello,I am new to ALSA and Linux. I was trying to understand the ALSAarchitecture.
> I have Linux Box with Intel sound card. with Suse 10.1 on it.I launched the audio player (Real player) and audio plays fine.
> Then, I built the kernel and installed it. I put some printk's in intel8x0.candcontrol.c. (could see the my code was complied)Even though I changed volume muted etc couldn't see any of my printk indmesg. One default printk in intel8x0.c was there, so I have put my printbefore that line as well, but couldn't see anything.
> Apologies If my problem is very basic. I read on forums that best way tolearn is to put printk's.
> Can anyone help me with where I am doing incorrectly, Am I supposed to do itthis way or some other way?
> Thanks in advance-Vinod
> _______________________________________________Alsa-devel mailing listAlsa-devel@alsa-project.orghttp://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>
>   -- Tobin Davis
>
> The man on tops walks a lonely street; the "chain" of command is often a noose.
>
>