Re: Help with sound on Fc16

[Scott Doty <scott@xxxxxxxxx>]

On 03/25/2012 07:37 PM, Joe Zeff wrote:

On 03/25/2012 11:42 AM, Kevin Fenzi wrote:

How are you logging in? gdm? How are you starting X?

Yes, I'm logging in on both computers via gdm and using XFCE.  The advice I got through fedorafourm.org simply stated that you had to be in the audio group to have access to the appropriate devices.

[joe@khorlia Desktop]$ ls -al /dev/snd
total 0
drwxr-xr-x.  3 root root      240 Mar 24 22:31 .
drwxr-xr-x. 18 root root     3980 Mar 23 15:32 ..
drwxr-xr-x.  2 root root       60 Mar 24 22:31 by-path
crw-rw----+  1 root audio 116,  8 Mar 24 22:31 controlC0
crw-rw----+  1 root audio 116,  7 Mar 23 15:33 pcmC0D0c
crw-rw----+  1 root audio 116,  6 Mar 23 15:33 pcmC0D0p
crw-rw----+  1 root audio 116,  5 Mar 24 22:31 pcmC0D1c
crw-rw----+  1 root audio 116,  4 Mar 24 22:31 pcmC0D2c
crw-rw----+  1 root audio 116,  3 Mar 24 22:31 pcmC0D3c
crw-rw----+  1 root audio 116,  2 Mar 23 15:33 pcmC0D4p
crw-rw----+  1 root audio 116,  1 Mar 24 22:31 seq
crw-rw----+  1 root audio 116, 33 Mar 24 22:31 timer

Sidenote:  It may work w/out being in the audio group, since your modes for those files include a "+".

The "+" means there's an acl on the file, in addition to "standard" Unix permissions.  As someone else mentioned, logging in on the console is supposed to set up those acl's.

Use the getfacl command to read the acls -- for instance, on this system:

_[/dev/snd]_(scott@eva)_
$ getfacl hwC0D0
# file: hwC0D0
# owner: root
# group: audio
user::rw-
user:scott:rw-
group::rw-
mask::rw-
other::---

The file reads:

crw-rw----+ 1 root audio 116, 10 Mar 22 20:22 hwC0D0

Yes, you could also "fix" a perms problem by dropping the user into the audio group -- but then, they will always have access to audio, even if they aren't logged in at the console...which could have security ramifications for multi-user systems.

 -Scott

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