Beep on X11 login screen

[Alan Cox]

> > sound card is 'however the last user left it' and we don't have enough
> > information to know the difference between 'owwww my ears' and 'pin drop'
> > or even which channel its mixed through if any.
> 
> Well, I'm pretty sure it's a PC speaker beep anyway. Not that that
> changes how you can tell how loud it will be.

It is PC speaker beep (if it wasnt it would get even more complex as it
would need to run esd/arts etc). On plenty of boxes pc beep is one of the
mixer lines however and we don't restore its state on logout