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

[Rashkae]

On 06/16/2011 07:16 PM, Robert P. J. Day wrote:
>    i'm open to suggestions.  clearly, it's a very bad thing that
> there's nothing listed under sound hardware, but i don't know how to
> reconfigure to get it back.  thoughts?
>
> rday
>

Just a few random thoughts, no real knowledge.

The proc would seem to indicate that everything seems to be working 
module wise, and this might be some kind of permissions problem.

Try running alsamixer as root in a console and see if you can get some 
sound to play as root.

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.)

If sound still doesn't work as root, I would next check to make sure 
your system is really restarting.   My debian system at one time got the 
kexec-tools package installed, which changed the behavior of 
restart/reboot command to load a new kernel without actually rebooting 
the hardware.  Sound modules didn't like that at all.