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Old 11-05-2004, 03:46 PM   #1
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Registered: Jun 2004
Location: Chico, CA
Distribution: Fedora core 1
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couldn't open mixer device /dev/sound/mixer

I had sound last night and today i got this error:

couldn't open mixer device /dev/sound/mixer

so no sound.

can anyone help? I don't really know what I am looking for so if you need more info just tell me.

lspci --

[root@localhost sound]# /sbin/lspci
00:00.0 Host bridge: Advanced Micro Devices [AMD] AMD-760 [IGD4-1P] System Controller (rev 13)
00:01.0 PCI bridge: Advanced Micro Devices [AMD] AMD-760 [IGD4-1P] AGP Bridge
00:04.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev 40)
00:04.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT8233/A/C/VT8235 PIPC Bus Master IDE (rev 06)
00:04.2 USB Controller: VIA Technologies, Inc. USB (rev 16)
00:04.3 USB Controller: VIA Technologies, Inc. USB (rev 16)
00:04.4 Non-VGA unclassified device: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 40)
00:05.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 10)
00:09.0 SCSI storage controller: Adaptec AHA-7850 (rev 03)
00:0a.0 Ethernet controller: D-Link System Inc RTL8139 Ethernet (rev 10)
00:0b.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 07)
00:0b.1 Input device controller: Creative Labs SB Live! MIDI/Game Port (rev 07)
00:0c.0 FireWire (IEEE 1394): VIA Technologies, Inc. IEEE 1394 Host Controller (rev 46)
01:05.0 VGA compatible controller: nVidia Corporation NV20 [GeForce3] (rev a3)

lsmod --

[root@localhost sound]# /sbin/lsmod
Module Size Used by Not tainted
ide-cd 34432 0 (autoclean)
soundcore 6468 0 (autoclean)
binfmt_misc 7212 1
parport_pc 18756 1 (autoclean)
lp 8580 0 (autoclean)
parport 37056 1 (autoclean) [parport_pc lp]
autofs 12084 0 (autoclean) (unused)
8139too 16616 1
mii 3992 0 [8139too]
ipt_REJECT 4248 1 (autoclean)
ipt_state 1080 1 (autoclean)
ip_conntrack 28552 1 (autoclean) [ipt_state]
iptable_filter 2444 1 (autoclean)
ip_tables 15136 3 [ipt_REJECT ipt_state iptable_filter]
st 31468 0 (autoclean) (unused)
sr_mod 17400 0 (autoclean) (unused)
cdrom 34592 0 (autoclean) [ide-cd sr_mod]
ohci1394 28776 0 (unused)
ieee1394 203940 0 [ohci1394]
floppy 57308 0 (autoclean)
sg 35436 0 (autoclean)
usb-storage 70432 0
keybdev 2656 0 (unused)
hid 23908 0 (unused)
usb-uhci 26124 0 (unused)
usbcore 78752 1 [usb-storage hid usb-uhci]
mousedev 5268 1 (autoclean)
input 5888 0 (autoclean) [keybdev hid mousedev]
ext3 71620 2
jbd 51276 2 [ext3]
aic7xxx 165584 0 (unused)
sd_mod 13388 0
scsi_mod 110248 6 [st sr_mod sg usb-storage aic7xxx sd_mod]
[root@localhost sound]#

Old 11-05-2004, 04:20 PM   #2
Registered: Nov 2004
Location: Slovak republic - Bratislava
Distribution: debian & gentoo
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Well, did You check if that "file" exists?
If so, did You look for permissions? I had problem like that a few years ago in Mandrake, chmod just solved everything...
Old 11-05-2004, 04:32 PM   #3
Registered: Apr 2002
Location: in a fallen world
Distribution: slackware by choice, others too :} ... android.
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/me can't spot a physical device-driver for any soundcard in lsmod's output

What sound-system (OSS or ALSA) are you supposedly using?

Old 11-05-2004, 05:13 PM   #4
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Registered: Jun 2004
Location: Chico, CA
Distribution: Fedora core 1
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yano, the file actually isn't there in that path, which is definately a concern, but when i "whereis mixer" i get "mixer:" so its not like i can move it or point to it, i dont even know what it is! plus, i didnt change any files or permissions yesterday so i dont understand what could have happened.

Tinkster, I am supposed to be running oss, though i did try to put on alsa once awhile back. It didn't take so i changed everything back in the /etc/modules.conf and uninstalled all alsa packages besides the library so that shouldnt matter...right?

here is my /etc/modules.conf

alias eth0 8139too
alias scsi_hostadapter aic7xxx
alias usb-controller usb-uhci
alias ieee1394-controller ohci1394
alias sound-slot-0 cmpci
alias sound-slot-1 emu10k1
post-install sound-slot-0 /bin/aumix-minimal -f /etc/.aumixrc -L >/dev/null 2>&1 || :
pre-remove sound-slot-0 /bin/aumix-minimal -f /etc/.aumixrc -S >/dev/null 2>&1 || :
post-install sound-slot-1 /bin/aumix-minimal -f /etc/.aumixrc -L >/dev/null 2>&1 || :
pre-remove sound-slot-1 /bin/aumix-minimal -f /etc/.aumixrc -S >/dev/null 2>&1 || :

okay, so where is the mixer supposed to be if i were running oss so i can make sure its there? wow, what a newbie question...
Old 11-15-2004, 08:03 AM   #5
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just a thought, if you're using ALSA, try recompiling with the OSS compatibility options enabled


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