alsamixer cannot open mixer: No such file or directory

Message

kevstar31 · Post by **kevstar31** » Sun Feb 21, 2010 4:00 am

kevin@localhost ~ $ alsamixer
cannot open mixer: No such file or directory
kevin@localhost ~ $ ls /dev|grep mixer
mixer
mixer1
mixer2
mixer3
kevin@localhost ~ $

God bless,
Kevin

Muso · Post by **Muso** » Sun Feb 21, 2010 5:02 am

emerge alsa-utils and add your user to the audio group?

kevstar31 · Post by **kevstar31** » Tue Feb 23, 2010 1:42 am

Chopinzee wrote:emerge alsa-utils and add your user to the audio group?

Already tryed both.

VoidMage · Post by **VoidMage** » Wed Feb 24, 2010 10:02 am

'ls /dev|grep mixer' is meaningless for alsa.
It's 'ls /dev/snd/control*'.

kevstar31 · Post by **kevstar31** » Wed Feb 24, 2010 5:32 pm

Code: Select all

kevin@localhost ~ $ ls /dev/snd/
ls: cannot access /dev/snd/: No such file or directory
kevin@localhost ~ $ cat /proc/asound/cards
 0 [NVidia         ]: HDA-Intel - HDA NVidia
                      HDA NVidia at 0xfb100000 irq 21

Kernel config

VoidMage · Post by **VoidMage** » Wed Feb 24, 2010 9:43 pm

What's your udev version ?
Do you have any "funny" custom udev rules regarding your soundcard ?
As it's in /proc, it should be in the correct place in /dev.

On a completely unrelated note: you may want to migrate to pure libata setup.
There are a few good reasons for it.

Stu_28 · Post by **Stu_28** » Wed Feb 24, 2010 11:17 pm

Did you run alsaconf?

VoidMage · Post by **VoidMage** » Wed Feb 24, 2010 11:35 pm

alsaconf seems off-topic here - as the card is seen in /proc, it is there, just not
in the proper place in /dev.

kevstar31 · Post by **kevstar31** » Thu Feb 25, 2010 7:53 pm

kevin@localhost ~ $ emerge -pvq udev
[ebuild R ] sys-fs/udev-151-r1 USE="devfs-compat old-hd-rules -extras (-selinux) -test"

VoidMage · Post by **VoidMage** » Fri Feb 26, 2010 12:57 am

So, about those custom rules...?

kevstar31 · Post by **kevstar31** » Fri Feb 26, 2010 3:18 am

VoidMage wrote:So, about those custom rules...?

Not that I know of but i have had problems such as missing and corrupted files recently.

VoidMage · Post by **VoidMage** » Fri Feb 26, 2010 10:54 am

Check /proc/asound for all the info, check /etc/udev/rules.d/ and /lib/udev/rules.d/
for all sound related rules. If the cards are in /proc/asound, there should be
somewhere in /dev (though /dev/snd should be the correct dir).
What's your kernel/alsa version ?

You may check udev-browse (not in portage, see 0pointer.de), it requires vala and libgee,
but it's a nice little GUI to show you content of udev tree.

kevstar31 · Post by **kevstar31** » Fri Feb 26, 2010 6:16 pm

Code: Select all

kevin@localhost ~ $ ls /etc/udev/rules.d/
64-device-mapper.rules  90-hal.rules
kevin@localhost ~ $ /lib/udev/rules.d/
bash: /lib/udev/rules.d/: is a directory
kevin@localhost ~ $ ls /lib/udev/rules.d/
30-kernel-compat.rules  50-firmware.rules      60-floppy.rules            60-persistent-serial.rules        60-persistent-v4l.rules          75-persistent-net-generator.rules  90-network.rules
40-gentoo.rules         50-udev-default.rules  60-persistent-alsa.rules   60-persistent-storage-tape.rules  61-persistent-storage-edd.rules  79-fstab_import.rules              95-udev-late.rules
40-isdn.rules           60-cdrom_id.rules      60-persistent-input.rules  60-persistent-storage.rules       75-cd-aliases-generator.rules    80-drivers.rules
kevin@localhost ~ $ cat /lib/udev/rules.d/
cat: /lib/udev/rules.d/: Is a directory
kevin@localhost ~ $ cat /lib/udev/rules.d/60-persistent-alsa.rules
# do not edit this file, it will be overwritten on update

ACTION!="add|change", GOTO="persistent_alsa_end"
SUBSYSTEM!="sound", GOTO="persistent_alsa_end"
KERNEL!="controlC[0-9]*", GOTO="persistent_alsa_end"

SUBSYSTEMS=="usb", ENV{ID_MODEL}=="", IMPORT{program}="usb_id --export %p"
SUBSYSTEMS=="usb", ENV{ID_IFACE}="$attr{bInterfaceNumber}"
ENV{ID_SERIAL}=="?*", ENV{ID_IFACE}=="?*", SYMLINK+="snd/by-id/$env{ID_BUS}-$env{ID_SERIAL}-$env{ID_IFACE}"
ENV{ID_SERIAL}=="?*", ENV{ID_IFACE}=="", SYMLINK+="snd/by-id/$env{ID_BUS}-$env{ID_SERIAL}"

ENV{ID_PATH}=="", IMPORT{program}="path_id %p"
ENV{ID_PATH}=="?*", SYMLINK+="snd/by-path/$env{ID_PATH}"

LABEL="persistent_alsa_end"
kevin@localhost ~ $ uname -A
uname: invalid option -- 'A'
Try `uname --help' for more information.
kevin@localhost ~ $ uname -a
Linux localhost 2.6.32.8 #3 SMP PREEMPT Sat Feb 20 11:22:58 EST 2010 x86_64 Dual-Core AMD Opteron(tm) Processor 1210 AuthenticAMD GNU/Linux
kevin@localhost ~ $ emerge -pqv alsa-utils
[ebuild   R   ] media-sound/alsa-utils-1.0.21-r1  USE="nls -doc -minimal"

 * IMPORTANT: 2 news items need reading for repository 'gentoo'.
 * Use eselect news to read news items.

kevin@localhost ~ $

VoidMage · Post by **VoidMage** » Fri Feb 26, 2010 9:54 pm

Check for any 'NAME="' strings (that is with only a single '=') among those rules.

See also /sys/class/sound/<your card>/<one of pcm devices> and check:

Code: Select all

udevadm info --query=all --path=/class/sound/<chosen device>

mimosinnet · Post by **mimosinnet** » Thu Feb 17, 2011 7:40 am

I just had the same message and the problem was incorrect kernel configuration of my card.

Cheers!