no /dev/mixer

vash331 · 01-03-2006, 11:02 PM

Gentoo Linux 2.6.14.5
alsa is built into the kernel
sound modules that load at boot:
snd-ac97-codec
snd-ac97-bus
snd-intel8x0
snd-page-alloc
snd-timer
snd
snd-pcm

for some reason /dev/mixer does not exist

Code:

# ls /dev/mixer
ls: /dev/mixer: No such file or directory

Code:

# lspci | grep Audio
00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 03)

Code:

# ls /dev/snd/
controlC0  pcmC0D0c  pcmC0D0p  pcmC0D1c  pcmC0D2c  pcmC0D3c  pcmC0D4p  timer

Code:

#cat /usr/share/alsa/alsa.conf
#
#  ALSA library configuration file
#

# pre-load the configuration files

@hooks [
	{
		func load
		files [
			"/etc/asound.conf"
			"~/.asoundrc"
		]
		errors false
	}
]

# load card-specific configuration files (on request)

cards.@hooks [
	{
		func load
		files [
			{
				@func concat
				strings [
					{ @func datadir }
					"/cards/aliases.conf"
				]
			}
		]
	}
	{
		func load_for_all_cards
		files [
			{
				@func concat
				strings [
					{ @func datadir }
					"/cards/"
					{ @func private_string }
					".conf"
				]
			}
		]
		errors false
	}
]

# defaults

defaults.ctl.card 0
defaults.pcm.card 0
defaults.pcm.device 0
defaults.pcm.subdevice -1
defaults.pcm.front.card defaults.pcm.card
defaults.pcm.front.device defaults.pcm.device
defaults.pcm.rear.card defaults.pcm.card
defaults.pcm.rear.device defaults.pcm.device
defaults.pcm.center_lfe.card defaults.pcm.card
defaults.pcm.center_lfe.device defaults.pcm.device
defaults.pcm.side.card defaults.pcm.card
defaults.pcm.side.device defaults.pcm.device
defaults.pcm.surround40.card defaults.pcm.card
defaults.pcm.surround40.device defaults.pcm.device
defaults.pcm.surround41.card defaults.pcm.card
defaults.pcm.surround41.device defaults.pcm.device
defaults.pcm.surround50.card defaults.pcm.card
defaults.pcm.surround50.device defaults.pcm.device
defaults.pcm.surround51.card defaults.pcm.card
defaults.pcm.surround51.device defaults.pcm.device
defaults.pcm.surround71.card defaults.pcm.card
defaults.pcm.surround71.device defaults.pcm.device
defaults.pcm.iec958.card defaults.pcm.card
defaults.pcm.iec958.device defaults.pcm.device
defaults.pcm.modem.card defaults.pcm.card
defaults.pcm.modem.device defaults.pcm.device
defaults.rawmidi.card 0
defaults.rawmidi.device 0
defaults.rawmidi.subdevice -1
defaults.hwdep.card 0
defaults.hwdep.device 0
defaults.timer.class 2
defaults.timer.sclass 0
defaults.timer.card 0
defaults.timer.device 0
defaults.timer.subdevice 0

#
#  PCM interface
#

pcm.hw {
	@args [ CARD DEV SUBDEV ]
	@args.CARD {
		type string
		default {
			@func getenv
			vars [
				ALSA_PCM_CARD
				ALSA_CARD
			]
			default {
				@func refer
				name defaults.pcm.card
			}
		}
	}
	@args.DEV {
		type integer
		default {
			@func igetenv
			vars [
				ALSA_PCM_DEVICE
			]
			default {
				@func refer
				name defaults.pcm.device
			}
		}
	}
	@args.SUBDEV {
		type integer
		default {
			@func refer
			name defaults.pcm.subdevice
		}
	}		
	type hw
	card $CARD
	device $DEV
	subdevice $SUBDEV
}

pcm.plughw {
	@args [ CARD DEV SUBDEV ]
	@args.CARD {
		type string
		default {
			@func getenv
			vars [
				ALSA_PCM_CARD
				ALSA_CARD
			]
			default {
				@func refer
				name defaults.pcm.card
			}
		}
	}
	@args.DEV {
		type integer
		default {
			@func igetenv
			vars [
				ALSA_PCM_DEVICE
			]
			default {
				@func refer
				name defaults.pcm.device
			}
		}
	}
	@args.SUBDEV {
		type integer
		default {
			@func refer
			name defaults.pcm.subdevice
		}
	}		
	type plug
	slave.pcm {
		type hw
		card $CARD
		device $DEV
		subdevice $SUBDEV
	}
}

pcm.plug {
	@args [ SLAVE ]
	@args.SLAVE {
		type string
	}
	type plug
	slave.pcm $SLAVE
}

pcm.shm {
	@args [ SOCKET PCM ]
	@args.SOCKET {
		type string
	}
	@args.PCM {
		type string
	}
	type shm
	server $SOCKET
	pcm $PCM
}

pcm.tee {
	@args [ SLAVE FILE FORMAT ]
	@args.SLAVE {
		type string
	}
	@args.FILE {
		type string
	}
	@args.FORMAT {
		type string
		default raw
	}
	type file
	slave.pcm $SLAVE
	file $FILE
	format $FORMAT
}

pcm.file {
	@args [ FILE FORMAT ]
	@args.FILE {
		type string
	}
	@args.FORMAT {
		type string
		default raw
	}
	type file
	slave.pcm null
	file $FILE
	format $FORMAT
}

pcm.null {
	type null
}

# redirect to load-on-demand extended pcm definitions
pcm.cards cards.pcm
# some links for easy use
pcm.front cards.pcm.front
pcm.rear cards.pcm.rear
pcm.center_lfe cards.pcm.center_lfe
pcm.side cards.pcm.side
pcm.surround40 cards.pcm.surround40
pcm.surround41 cards.pcm.surround41
pcm.surround50 cards.pcm.surround50
pcm.surround51 cards.pcm.surround51
pcm.surround71 cards.pcm.surround71
pcm.iec958 cards.pcm.iec958
pcm.spdif cards.pcm.iec958
pcm.modem cards.pcm.modem
pcm.phoneline cards.pcm.phoneline

pcm.default cards.pcm.default
pcm.dmix cards.pcm.dmix
pcm.dsnoop cards.pcm.dsnoop

#
#  Control interface
#
	
ctl.hw {
	@args[ CARD ]
	@args.CARD {
		type string
		default {
			@func getenv
			vars [
				ALSA_CTL_CARD
				ALSA_CARD
			]
			default {
				@func refer
				name defaults.ctl.card
			}
		}
	}
	type hw
	card $CARD
}

ctl.shm {
	@args [ SOCKET CTL ]
	@args.SOCKET {
		type string
	}
	@args.CTL {
		type string
	}
	type shm
	server $SOCKET
	ctl $CTL
}

ctl.default {
	type hw
	card {
		@func getenv
		vars [
			ALSA_CTL_CARD
			ALSA_CARD
		]
		default {
			@func refer
			name defaults.ctl.card
		}
	}
}

#
#  RawMidi interface
#

rawmidi.hw {
	@args [ CARD DEV SUBDEV ]
	@args.CARD {
		type string
		default {
			@func getenv
			vars [
				ALSA_RAWMIDI_CARD
				ALSA_CARD
			]
			default {
				@func refer
				name defaults.rawmidi.card
			}
		}
	}
	@args.DEV {
		type integer
		default {
			@func igetenv
			vars [
				ALSA_RAWMIDI_DEVICE
			]
			default {
				@func refer
				name defaults.rawmidi.device
			}
		}
	}
	@args.SUBDEV {
		type integer
		default -1
	}
	type hw
	card $CARD
	device $DEV
	subdevice $SUBDEV
}

rawmidi.default {
	type hw
	card {
		@func getenv
		vars [
			ALSA_RAWMIDI_CARD
			ALSA_CARD
		]
		default {
			@func refer
			name defaults.rawmidi.card
		}
	}
	device {
		@func igetenv
		vars [
			ALSA_RAWMIDI_DEVICE
		]
		default {
			@func refer
			name defaults.rawmidi.device
		}
	}
}

rawmidi.virtual {
	@args [ MERGE ]
	@args.MERGE {
		type string
		default 1
	}
	type virtual
	merge $MERGE
}

#
#  Sequencer interface
#

seq.default {
	type hw
}

seq.hw {
	type hw
}

#
#  HwDep interface
#

hwdep.hw {
	@args [ CARD DEV ]
	@args.CARD {
		type string
		default {
			@func getenv
			vars [
				ALSA_HWDEP_CARD
				ALSA_CARD
			]
			default {
				@func refer
				name defaults.hwdep.card
			}
		}
	}
	@args.DEV {
		type integer
		default {
			@func igetenv
			vars [
				ALSA_HWDEP_DEVICE
			]
			default {
				@func refer
				name defaults.hwdep.device
			}
		}
	}
	type hw
	card $CARD
	device $DEV
}

hwdep.default {
	type hw
	card {
		@func getenv
		vars [
			ALSA_HWDEP_CARD
			ALSA_CARD
		]
		default {
			@func refer
			name defaults.hwdep.card
		}
	}
	device {
		@func igetenv
		vars [
			ALSA_HWDEP_DEVICE
		]
		default {
			@func refer
			name defaults.hwdep.device
		}
	}
}

#
#  Timer interface
#

timer_query.hw {
	type hw
}

timer_query.default {
	type hw
}

timer.hw {
	@args [ CLASS SCLASS CARD DEV SUBDEV ]
	@args.CLASS {
		type integer
		default {
			@func refer
			name defaults.timer.class
		}
	}
	@args.SCLASS {
		type integer
		default {
			@func refer
			name defaults.timer.sclass
		}
	}
	@args.CARD {
		type string
		default {
			@func refer
			name defaults.timer.card
		}
	}
	@args.DEV {
		type integer
		default {
			@func refer
			name defaults.timer.device
		}
	}
	@args.SUBDEV {
		type integer
		default {
			@func refer
			name defaults.timer.subdevice
		}
	}
	type hw
	class $CLASS
	sclass $SCLASS
	card $CARD
	device $DEV
	subdevice $SUBDEV
}

timer.default {
	type hw
	class {
		@func refer
		name defaults.timer.class
	}
	sclass {
		@func refer
		name defaults.timer.sclass
	}
	card {
		@func refer
		name defaults.timer.card
	}
	device {
		@func refer
		name defaults.timer.device
	}
	subdevice {
		@func refer
		name defaults.timer.subdevice
	}
}

Code:

cat /etc/modules.d/alsa
# Alsa 0.9.X kernel modules' configuration file.
# $Header: /var/cvsroot/gentoo-x86/media-sound/alsa-utils/files/alsa-modules.conf-rc,v 1.4 2004/11/16 01:31:22 eradicator Exp $

# ALSA portion
# OSS/Free portion

#MINE

##
## IMPORTANT:
## You need to customise this section for your specific sound card(s)
## and then run `update-modules' command.
## Read alsa-driver's INSTALL file in /usr/share/doc for more info.
##
##  ALSA portion
## alias snd-card-0 snd-interwave
## alias snd-card-1 snd-ens1371
##  OSS/Free portion
## alias sound-slot-0 snd-card-0
## alias sound-slot-1 snd-card-1
##

# OSS/Free portion - card #1
##  OSS/Free portion - card #2
## alias sound-service-1-0 snd-mixer-oss
## alias sound-service-1-3 snd-pcm-oss
## alias sound-service-1-12 snd-pcm-oss

alias /dev/mixer snd-mixer-oss
alias /dev/dsp snd-pcm-oss
alias /dev/midi snd-seq-oss

# Set this to the correct number of cards.

# --- BEGIN: Generated by ALSACONF, do not edit. ---
# --- ALSACONF version 1.0.10rc3 ---
alias snd-card-0 snd-intel8x0
alias sound-slot-0 snd-intel8x0
# --- END: Generated by ALSACONF, do not edit. -

Thanks!

generic_genus · 01-04-2006, 05:26 PM

Have you properly migrated to udev as devfs is no longer supported? If not:

emerge udev

I believe you only have to install it but that's from memory so no gurantees, if you have done this then try creating the device file manually as root:

mknod /dev/mixer c 14 0