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Old 08-07-2004, 02:41 PM   #1
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Registered: Aug 2003
Distribution: Fedora, Slackware
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where is /dev/mixer?


i'm using slackware 10 with the (testing) kernel 2.6.7. while sound works fine with xmms (and alsa driver) it doesn`t work with mplayer. i get an error message about the missing device file /dev/mixer when choosing the alsa driver.

ALSA lib control.c:654: (snd_ctl_open_noupdate) Invalid CTL /dev/mixer 77%
alsa-control: mixer attach /dev/mixer error: Datei oder Verzeichnis nicht gefunden
so, i realized there is no /dev/mixer and no /dev/dsp. i'm not sure what these files are good for and why these are missing ...

any help is appreciated, thanks!
Old 08-07-2004, 03:44 PM   #2
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if you have /dev/sound/mixer and /dev/sound/dsp, try :

ln -s /dev/sound/mixer /dev/mixer
ln -s /dev/sound/dsp /dev/dsp
Old 08-07-2004, 06:29 PM   #3
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thanks for this hint, i actually realize that the finding file names by using the "tab" key in bash wouldn't work with device files ... therefore the files are existent and correct symlinks. that seems even strange, the file is there (with rw-rights on others) but mplayer doesn`t find it??
wonder what`s going on with good ol` mplayer?
Old 08-19-2004, 01:56 PM   #4
Registered: Nov 2003
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>wonder what`s going on with good ol` mplayer?

I have the same problem. There is something wrong with gmplayer (GUI of mplayer) in MPlayer 1.0pre5. I guess this is the verison you are using.
There are few ways to bypass the problem::
* use ESD as an audio driver in gmplayer
* use mplayer from command line
* use kmplayer (KDE GUI for mplayer)
Old 08-20-2004, 12:40 AM   #5
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Registered: Mar 2003
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Check to see if the OSS emulation modules are loaded,
mike@slaptop:~$ lsmod |grep oss
snd_pcm_oss            49864  0 
snd_mixer_oss          17600  1 snd_pcm_oss
snd_pcm                86152  2 snd_pcm_oss,snd_es1968
snd                    47972  9 snd_pcm_oss,snd_mixer_oss,snd_es1968,snd_ac97_codec,snd_pcm,snd_timer,snd_mpu401_uart,snd_rawmidi,snd_seq_device
/dev/mixer and /dev/dsp are legacies from the OSS days, as I understand it.. You'll only be able to use them if you've got those emulation modules loaded and working.

Old 08-29-2004, 01:12 AM   #6
Registered: Nov 2003
Location: Brisbane, Australia
Distribution: Crux 2.0
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Cool it's an gmplayer bug

This is a known issue with mplayer pre-05 it seems, and supposedly fixed in the CVS.
See here

Old 08-31-2004, 09:35 AM   #7
Registered: Sep 2003
Distribution: Zenwalk 2.8
Posts: 37

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Hi folks,

I found this link:

that contains a patch to apply to some MPlayer source files to fix the problem.

Enjoy it !


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