problems with sound under jessie

Hello,

I am having some troubles with sound under jessie 64bits. The problem is certainly due to insufficient permissions, but I am looking for a proper way to solve it.

Actually when running xfce4 mixer it says

GStreamer was unable to detect any sound devices. Some sound system specific GStreamer packages may be missing. It may also be a permissions problem.

If I run it as root, it works fine and I can hear sound. If I add my user to the audio group sound works as well. The problem is that I have an ldap with couple hundred users and I don't think that adding them all is the proper way to do the thing.

Here is some additional information

root@host:~# hwinfo --sound 19: PCI 1b.0: 0403 Audio device [Created at pci.328] Unique ID: u1Nb.JCtCKYv9IN3 SysFS ID: /devices/pci0000:00/0000:00:1b.0 SysFS BusID: 0000:00:1b.0 Hardware Class: sound Model: "Intel C600/X79 series chipset High Definition Audio Controller" Vendor: pci 0x8086 "Intel Corporation" Device: pci 0x1d20 "C600/X79 series chipset High Definition Audio Controller" SubVendor: pci 0x1028 "Dell" SubDevice: pci 0x05d2 Revision: 0x06 Driver: "snd_hda_intel" Driver Modules: "snd_hda_intel" Memory Range: 0xfb220000-0xfb223fff (rw,non-prefetchable) IRQ: 78 (257 events) Module Alias: "pci:v00008086d00001D20sv00001028sd000005D2bc04sc03i00" Driver Info #0: Driver Status: snd_hda_intel is active Driver Activation Cmd: "modprobe snd_hda_intel" Config Status: cfg=new, avail=yes, need=no, active=unknown 27: PCI 200.1: 0403 Audio device [Created at pci.328] Unique ID: 2Oa+._fw38BDFkM0 Parent ID: _Znp.nMBktMhAWbC SysFS ID: /devices/pci0000:00/0000:00:02.0/0000:02:00.1 SysFS BusID: 0000:02:00.1 Hardware Class: sound Model: "nVidia GK107 HDMI Audio Controller" Vendor: pci 0x10de "nVidia Corporation" Device: pci 0x0e1b "GK107 HDMI Audio Controller" SubVendor: pci 0x10de "nVidia Corporation" SubDevice: pci 0x094c Revision: 0xa1 Driver: "snd_hda_intel" Driver Modules: "snd_hda_intel" Memory Range: 0xfb080000-0xfb083fff (rw,non-prefetchable) IRQ: 36 (99 events) Module Alias: "pci:v000010DEd00000E1Bsv000010DEsd0000094Cbc04sc03i00" Driver Info #0: Driver Status: snd_hda_intel is active Driver Activation Cmd: "modprobe snd_hda_intel" Config Status: cfg=new, avail=yes, need=no, active=unknown Attached to: #10 (PCI bridge)

root@host:~# ls -la /dev/snd/ total 0 drwxr-xr-x 3 root root 280 nov. 26 13:42 . drwxr-xr-x 19 root root 3440 nov. 26 13:42 .. drwxr-xr-x 2 root root 80 nov. 26 13:42 by-path crw-rw----+ 1 root audio 116, 2 nov. 26 13:42 controlC0 crw-rw----+ 1 root audio 116, 6 nov. 26 13:42 controlC1 crw-rw----+ 1 root audio 116, 5 nov. 26 13:42 hwC0D0 crw-rw----+ 1 root audio 116, 10 nov. 26 13:42 hwC1D0 crw-rw----+ 1 root audio 116, 4 nov. 26 13:42 pcmC0D0c crw-rw----+ 1 root audio 116, 3 nov. 26 13:42 pcmC0D0p crw-rw----+ 1 root audio 116, 7 nov. 26 13:42 pcmC1D3p crw-rw----+ 1 root audio 116, 8 nov. 26 13:42 pcmC1D7p crw-rw----+ 1 root audio 116, 9 nov. 26 13:42 pcmC1D8p crw-rw----+ 1 root audio 116, 1 nov. 26 13:42 seq crw-rw----+ 1 root audio 116, 33 nov. 26 13:42 timer

Linux host 3.16.0-4-amd64 #1 SMP Debian 3.16.7-2 (2014-11-06) x86_64 GNU/Linux

The strangest thing is that I have a similar install on a next-by machine and sound works well without any particular setups.

Any help would be welcome.

Best regards,

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I suspect if you check the file permissions on the working box they will be the same.

Users that use sound should be members of the audio group. This should be, I think, set up by default, if the user is created when the system was installed.

Groups control the access to the system by putting them in groups. You can add groups of your own too.

I see no way that having permission to use audio is going to be a threat as long as the users are not part of the admin group and certainly not root group or sudo group.

They can mess with the user land configuration as much as they want and it will only effect them. Any configuration they do will go in the appropriate ~/.foo file in their /home/<user name> directory and only be activated when they are logged in and will only effect them.

Other users will be using the user configuration settings that they set up from those same files in their /home/user directory.

Hello wigdet,

Originally Posted by widget I suspect if you check the file permissions on the working box they will be the same.

The permissions are the same on all the boxes. The group audio has no members on any of the machines. Although on couple of them I have sound and on the rest no sound at all.

Originally Posted by widget Users that use sound should be members of the audio group. This should be, I think, set up by default, if the user is created when the system was installed.

All my users are ldap users, created dynamically. This means that each time that I add a new user, I should also modify the /etc/group file on every single machine. This is a bit tedious.

Thank you for any further comments,

Best,

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That would be tedious but if your boxes are all connected to the same control box all the time you should be able to pretty easily build a sed command that would modify all the files at once.

I have a splitting headache right now and not about to even think how that would be set up. But if you mount all your systems in the box you manage them from in /mnt you should be able to set up a command to add what you need

Might be easier with cat but I really can't think straight right now.

EDIT;
Nope can't think. The easy thing to do is a series command for addgroup or adduser I suspect.

Seems like you should be able to configure adduser to add new users to the group audio when you create the user.

It's not very logical though. As I've mentioned, there are machines with no users in the audio group and with working sound. After exactly the same installation process, there other machines with no sound. My question is how to get to know the reason for working or not working of a device (given that on the machines, on which sound is not working as user, it is indeed working as super-user).

Best,

--

The group audio has no members on any of the machines. Although on couple of them I have sound and on the rest no sound at all.

The problem is that when you created users you didn't add specify users groups. What command did you use to add the user? Did you use useradd or adduser, because adduser is interactive & prompts for group.

Hello,

as stated in my first post, the users are added via ldap. In my nsswitch file, there is a compat, ldap statement.

Best,

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