no sound for user

[anthony baldwin]

Hi,

I´m completely confused.
I set my daughter up as a user on my machine, and there is no sound when 
she is logged in.
I don´t understand.  All of the settings for the sound system are 
exactly the same for her as for me.
KMix doesn´t find a mixer, whatever that means, which makes no sense to 
me, since KMix
is fine when I am logged in.
The truth is, I don´t run KMix and have no trouble with sound anyway, 
when I am logged in.
But under my daughter´s username, I get no sound, either with or without 
KMix running.

Furthermore, and likely this deserves separate thread, I must be 
confused about how sudo works...
When I logged in under my daughter´s username and tried to get into 
terminal to poke around and
see if I could determine or repair this issue, my password does not 
allow me to sudo.
But hers does...I don´t want her to have sudo access.  I though only I 
had sudo access, and that only
my password would open sudo, and that I could do so from terminal 
regardless of what user is logged in.
That makes sense to me, perhaps because I am accustomed to having su/root.
But that is not what is happening here, and that scares me.
Somehow, this little bit of news has completely befuddled my 
understanding and confidence in this whole sudo bit.
Perhaps someone could explain to me where I am wrong in thinking that it 
appears as though any user has
access to sudo, and the real administrator (me) can only sudo when I am 
logged in under my username,
as opposed to having root access regardless of who is logged in.

tony