under newer hand-rolled kernel, sound has gone away on ubuntu 11.04

[Robert P. J. Day]

On Thu, 16 Jun 2011, Rashkae wrote:

> If it works as root, have a look as the ownership and permissions of
> your sound devices in /dev.  Don't forget to install and use getfacl
> to get all the permissions (ACL's are used on /dev nodes.)

  that may in fact be the problem here.  i needed some of the features
in my newer kernel so i rebooted but only after i'd recorded a number
of things under the older kernel.  and lo and behold, here's a
difference between the two systems -- note the use of ACLs under the
older kernel:

===== 2.6.39-rc7-dirty:

$ ls -l /dev/snd
total 0
drwxr-xr-x  2 root root       60 2011-06-17 07:43 by-path
crw-rw----+ 1 root audio 116,  9 2011-06-17 07:43 controlC0
crw-rw----+ 1 root audio 116,  8 2011-06-17 07:43 hwC0D0
crw-rw----+ 1 root audio 116,  7 2011-06-17 07:43 hwC0D1
crw-rw----+ 1 root audio 116,  6 2011-06-17 07:43 hwC0D3
crw-rw----+ 1 root audio 116,  5 2011-06-17 08:04 pcmC0D0c
crw-rw----+ 1 root audio 116,  4 2011-06-17 09:50 pcmC0D0p
crw-rw----+ 1 root audio 116,  3 2011-06-17 08:04 pcmC0D1p
crw-rw----+ 1 root audio 116,  2 2011-06-17 08:04 pcmC0D3p
crw-rw----+ 1 root audio 116,  1 2011-06-17 08:04 seq
crw-rw----+ 1 root audio 116, 33 2011-06-17 07:43 timer

===== 3.0.0-rc3-00165-gf8f44f0-dirty:

$ ls -l /dev/snd
total 0
drwxr-xr-x 2 root root       60 2011-06-17 11:12 by-path
crw-rw---- 1 root audio 116,  9 2011-06-17 11:12 controlC0
crw-rw---- 1 root audio 116,  8 2011-06-17 11:12 hwC0D0
crw-rw---- 1 root audio 116,  7 2011-06-17 11:12 hwC0D1
crw-rw---- 1 root audio 116,  6 2011-06-17 11:12 hwC0D3
crw-rw---- 1 root audio 116,  5 2011-06-17 11:12 pcmC0D0c
crw-rw---- 1 root audio 116,  4 2011-06-17 11:12 pcmC0D0p
crw-rw---- 1 root audio 116,  3 2011-06-17 11:12 pcmC0D1p
crw-rw---- 1 root audio 116,  2 2011-06-17 11:12 pcmC0D3p
crw-rw---- 1 root audio 116,  1 2011-06-17 11:12 seq
crw-rw---- 1 root audio 116, 33 2011-06-17 11:12 timer

  sadly, i don't have the freedom to reboot yet again to the older
kernel, so if someone is running a ubuntu system for which there is
clearly ACL info on their /dev/snd files, can you fill me in on what
you see there, and i can try to reproduce that under the newer kernel.
thanks.

rday

-- 

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Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
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