Re: How to create /dev/dsp ?

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Timothy Murphy a écrit :
> François Patte wrote:
> 
> 
>>>I took a disk out of one computer, and put it in another
>>>(more precisely, I took out the Utrabay hard disk from a ThinkPad T20
>>>and put it in a ThinkPad T23)
>>>and now I am told there is no sound because
>>>"Device /dev/dsp does not exist".
>>
>>You can create all sound devices running the command : MAKEDEV sound
>>
>>The problem is: do these devices will survive to a reboot.
>>
>>Had you kudzu enabled when you put your drive in your new laptop? If not
>>it is not too late to enable it and reboot and see what happens.
>>
>>Another post suggest to run snd-config from the menu "System
>>configuration" This can work too.
> 
> 
> Thanks for your response.
> I now have /dev/dsp, but still no sound!
> 
> I discovered, as was suggested, that I did not have an appropriate driver
> for the sound card (Intel 82801CA/CAM AC'97 according to lspci)
> in my ThinkPad T23.
> 
> I had assumed (from a quick look on the web)
> that I needed the ALSA OSS-compatibility module snd_emu10k1
> but it seems that this is not sufficient on its own.
> I now have the module snd_intel8x0 running as well,
> and this is shown (eg on running system-config-soundcard)
> as the module attached to the soundcard.
> This says that the "Default PCM Device" (whatever that means)
> is "Intel ICH [Intel 82801CA-ICH3]".
> 
> What I don't understand is the various aliases that it has been suggested
> one should put in /etc/modprobe.conf .
> I now have
> ------------------------------------------
> alias char-major-116 snd
> alias char-major-14 soundcore
> alias sound-service-0-0 snd-mixer-oss
> alias sound-service-0-1 snd-seq-oss
> alias sound-service-0-3 snd-pcm-oss
> alias sound-service-0-8 snd-seq-oss
> alias sound-service-0-12 snd-pcm-oss
> 
> #alias sound-slot-0 snd_emu10k1
> #alias snd-card-0 snd_emu10k1
> alias snd-card-0 snd-intel8x0
> ------------------------------------------
> 
> But I have no idea what these instructions mean
> and have been unable to find information on them on the web.

You can have these information installing kernel-doc and have a look at:

/usr/share/doc/kernel-doc-2.6.17/Documentation/sound
(if your kernel is 2.6.17)

did you run the "dectection of sound card" from the gnome menu? If yes
did it find the card?

Have you a /proc/asound/ directory and, if yes, what is inside?

Try to run alsamixer from a terminal and see if you speakers are unmute

....


-- 
François Patte
UFR de mathématiques et informatique
Université Paris 5 - Paris
http://www.math-info.univ-paris5.fr/~patte


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