No sound after last kernel update.

Phil Meyer pmeyer at
Fri Feb 1 20:33:05 UTC 2008

Stefan Kuhlemann wrote:
> Lonni J Friedman schrieb:
>> On Feb 1, 2008 9:59 AM, Stefan Kuhlemann <kuhlemann at> wrote:
>>> hackob schrieb:
>>>> Hi,
>>>> After last kernel update I have no sound in my pc, I have an Intel
>>>> AC'97. If I do a lspci I can see the sound card, but in gnome desktop
>>>> Sound Hardware I only have the PCM output and Modem speaker.
>>>> Any idea?, tks.
>>>> Hackob.
>>> Same problem here.
>>> After the last kernelupdate - no sound. After some testing i figured
> [...]
>>> So...
>>> - How could I set /dev/dsp and /dev/mixer to '666-permission' 
>>> permanent?
>> udev should be doing this.  I guess you could just hack the chmod into
>> /etc/rc.local as a temporary workaround.
> Yes, that should do it :-)
> But it would be nice to set those permissions permanently. Anybody 
> with a hint out there?
> How do I set permissions for /dev/[whatever] which aren't lost after a 
> reboot?

This is what console.perms is for.

It may be that additional items may need to be added to console.perms 
upstream, but for now you can easily add your own.

You can edit /etc/security/console.perms.d/50-default.perms or add a new 
definition file into that directory.

The difference between console.perms and udev is largely a matter of 
When do things need to happen?  If it needs to happen at boot time, 
think udev.  If it needs to happen when a user logs in, then think 

Good luck!

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