* Follow Up: "Why my linux OS has only 8 sound cards ? How can I modify it ?"
@ 2012-05-08 12:52 Maciej Paszta
2012-05-08 13:02 ` Clemens Ladisch
0 siblings, 1 reply; 5+ messages in thread
From: Maciej Paszta @ 2012-05-08 12:52 UTC (permalink / raw)
To: Alsa-devel
Hi!
This issue has already been brought up by Chris Shen on Nov 8 2011.
Quick reminder: I have 10 sound cards which need to have oss emulation
enabled. However, I only see 8 devices (dsp-dsp7). Takashi suggested a
patch to workaround this problem:
http://mailman.alsa-project.org/pipermail/alsa-devel/2011-November/045764.html
I've applied it to kernel 3.0.0 and the only result I get is message
appearing in kernel logs: "unable to register OSS PCM device 8:0". I've
done some debugging and the registration fails on these lines
(sound/core/sound_oss.c):
register1 = register_sound_special_device(f_ops, minor, carddev);
if (register1 != minor)
{
snd_printk(KERN_ERR "OSS: 4, register1: %i, minor %i\n", register1,
minor);
goto __end;
}
the debug lines seem to be constant about the value of "register1" ==
-2. I would really appreciate any help with this problem and I will be
glad to test any patches, that may solve the issue.
--
Maciej Paszta
Mobile Systems Research Labs, Poznan University of Technology
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: Follow Up: "Why my linux OS has only 8 sound cards ? How can I modify it ?"
2012-05-08 12:52 Follow Up: "Why my linux OS has only 8 sound cards ? How can I modify it ?" Maciej Paszta
@ 2012-05-08 13:02 ` Clemens Ladisch
2012-05-08 13:32 ` Takashi Iwai
0 siblings, 1 reply; 5+ messages in thread
From: Clemens Ladisch @ 2012-05-08 13:02 UTC (permalink / raw)
To: Maciej Paszta; +Cc: Alsa-devel
Maciej Paszta wrote:
> Quick reminder: I have 10 sound cards which need to have oss emulation
> enabled. However, I only see 8 devices (dsp-dsp7). Takashi suggested a
> patch to workaround this problem:
> http://mailman.alsa-project.org/pipermail/alsa-devel/2011-November/045764.html
> I've applied it to kernel 3.0.0 and the only result I get is message
> appearing in kernel logs: "unable to register OSS PCM device 8:0". I've
> done some debugging and the registration fails on these lines
> (sound/core/sound_oss.c):
> register1 = register_sound_special_device(f_ops, minor, carddev);
Try replacing 128 with 256 in register_sound_special_device() in
sound/sound_core.c.
Regards,
Clemens
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Follow Up: "Why my linux OS has only 8 sound cards ? How can I modify it ?"
2012-05-08 13:02 ` Clemens Ladisch
@ 2012-05-08 13:32 ` Takashi Iwai
2012-05-08 14:15 ` Maciej Paszta
0 siblings, 1 reply; 5+ messages in thread
From: Takashi Iwai @ 2012-05-08 13:32 UTC (permalink / raw)
To: Clemens Ladisch; +Cc: Alsa-devel, Maciej Paszta
At Tue, 08 May 2012 15:02:33 +0200,
Clemens Ladisch wrote:
>
> Maciej Paszta wrote:
> > Quick reminder: I have 10 sound cards which need to have oss emulation
> > enabled. However, I only see 8 devices (dsp-dsp7). Takashi suggested a
> > patch to workaround this problem:
> > http://mailman.alsa-project.org/pipermail/alsa-devel/2011-November/045764.html
> > I've applied it to kernel 3.0.0 and the only result I get is message
> > appearing in kernel logs: "unable to register OSS PCM device 8:0". I've
> > done some debugging and the registration fails on these lines
> > (sound/core/sound_oss.c):
> > register1 = register_sound_special_device(f_ops, minor, carddev);
>
> Try replacing 128 with 256 in register_sound_special_device() in
> sound/sound_core.c.
Actually it should be 256, instead of 256 + unit, like the patch below.
Takashi
---
diff --git a/sound/sound_core.c b/sound/sound_core.c
index c6e81fb..fb9255c 100644
--- a/sound/sound_core.c
+++ b/sound/sound_core.c
@@ -361,7 +361,7 @@ int register_sound_special_device(const struct file_operations *fops, int unit,
struct device *dev)
{
const int chain = unit % SOUND_STEP;
- int max_unit = 128 + chain;
+ int max_unit = 256;
const char *name;
char _name[16];
^ permalink raw reply related [flat|nested] 5+ messages in thread* Re: Follow Up: "Why my linux OS has only 8 sound cards ? How can I modify it ?"
2012-05-08 13:32 ` Takashi Iwai
@ 2012-05-08 14:15 ` Maciej Paszta
2012-05-08 15:00 ` Takashi Iwai
0 siblings, 1 reply; 5+ messages in thread
From: Maciej Paszta @ 2012-05-08 14:15 UTC (permalink / raw)
To: alsa-devel
Thanks!
Changing to 256 made all devices appear!
On 2012-05-08 15:32, Takashi Iwai wrote:
> At Tue, 08 May 2012 15:02:33 +0200,
> Clemens Ladisch wrote:
>> Maciej Paszta wrote:
>>> Quick reminder: I have 10 sound cards which need to have oss emulation
>>> enabled. However, I only see 8 devices (dsp-dsp7). Takashi suggested a
>>> patch to workaround this problem:
>>> http://mailman.alsa-project.org/pipermail/alsa-devel/2011-November/045764.html
>>> I've applied it to kernel 3.0.0 and the only result I get is message
>>> appearing in kernel logs: "unable to register OSS PCM device 8:0". I've
>>> done some debugging and the registration fails on these lines
>>> (sound/core/sound_oss.c):
>>> register1 = register_sound_special_device(f_ops, minor, carddev);
>> Try replacing 128 with 256 in register_sound_special_device() in
>> sound/sound_core.c.
> Actually it should be 256, instead of 256 + unit, like the patch below.
>
>
> Takashi
>
> ---
> diff --git a/sound/sound_core.c b/sound/sound_core.c
> index c6e81fb..fb9255c 100644
> --- a/sound/sound_core.c
> +++ b/sound/sound_core.c
> @@ -361,7 +361,7 @@ int register_sound_special_device(const struct file_operations *fops, int unit,
> struct device *dev)
> {
> const int chain = unit % SOUND_STEP;
> - int max_unit = 128 + chain;
> + int max_unit = 256;
> const char *name;
> char _name[16];
>
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
--
Maciej Paszta
Mobile Systems Research Labs, Poznan University of Technology
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: Follow Up: "Why my linux OS has only 8 sound cards ? How can I modify it ?"
2012-05-08 14:15 ` Maciej Paszta
@ 2012-05-08 15:00 ` Takashi Iwai
0 siblings, 0 replies; 5+ messages in thread
From: Takashi Iwai @ 2012-05-08 15:00 UTC (permalink / raw)
To: Maciej Paszta; +Cc: alsa-devel
At Tue, 08 May 2012 16:15:24 +0200,
Maciej Paszta wrote:
>
> Thanks!
>
> Changing to 256 made all devices appear!
OK, I'll queue the fixes for 3.5 kernel.
thanks,
Takashi
> On 2012-05-08 15:32, Takashi Iwai wrote:
> > At Tue, 08 May 2012 15:02:33 +0200,
> > Clemens Ladisch wrote:
> >> Maciej Paszta wrote:
> >>> Quick reminder: I have 10 sound cards which need to have oss emulation
> >>> enabled. However, I only see 8 devices (dsp-dsp7). Takashi suggested a
> >>> patch to workaround this problem:
> >>> http://mailman.alsa-project.org/pipermail/alsa-devel/2011-November/045764.html
> >>> I've applied it to kernel 3.0.0 and the only result I get is message
> >>> appearing in kernel logs: "unable to register OSS PCM device 8:0". I've
> >>> done some debugging and the registration fails on these lines
> >>> (sound/core/sound_oss.c):
> >>> register1 = register_sound_special_device(f_ops, minor, carddev);
> >> Try replacing 128 with 256 in register_sound_special_device() in
> >> sound/sound_core.c.
> > Actually it should be 256, instead of 256 + unit, like the patch below.
> >
> >
> > Takashi
> >
> > ---
> > diff --git a/sound/sound_core.c b/sound/sound_core.c
> > index c6e81fb..fb9255c 100644
> > --- a/sound/sound_core.c
> > +++ b/sound/sound_core.c
> > @@ -361,7 +361,7 @@ int register_sound_special_device(const struct file_operations *fops, int unit,
> > struct device *dev)
> > {
> > const int chain = unit % SOUND_STEP;
> > - int max_unit = 128 + chain;
> > + int max_unit = 256;
> > const char *name;
> > char _name[16];
> >
> > _______________________________________________
> > Alsa-devel mailing list
> > Alsa-devel@alsa-project.org
> > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>
>
> --
> Maciej Paszta
> Mobile Systems Research Labs, Poznan University of Technology
>
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2012-05-08 15:00 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2012-05-08 12:52 Follow Up: "Why my linux OS has only 8 sound cards ? How can I modify it ?" Maciej Paszta
2012-05-08 13:02 ` Clemens Ladisch
2012-05-08 13:32 ` Takashi Iwai
2012-05-08 14:15 ` Maciej Paszta
2012-05-08 15:00 ` Takashi Iwai
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.