Beep on shutdown, KDE 64 bit

[Nivkie]

I have BackTrack 5 KDE 64 bit installed next to several other operating systems (Win 7, ubuntu, mint) on a Dell Studio XPS 1640. Everything is working fine except this annoying beep at poweroff. It last for about 1 second and is audible immediately when I execute the "poweroff" command via pressing enter.
In blacklist.conf I tried blacklisting pcspkr and also snd_pcsp to no avail, so now I am wondering what else I can try or see why it is even beeping at all?

[Toaster]

I am being ailed by the same problem.

[psylence]

I'm with ya. That might actually be the most annoying sound in the world.

[DrDillDoughs]

Step 1
I just went through this, and this is the solution:


Open up a Terminal and type:

sudo alsamixer

Now using your left/right arrow keys navigate over to PC Beep and press M on your keyboard, you'll see MM appear under the volume bar, this basically means it's been muted now press Esc to exit.

Step 2

Now run the command:

sudo alsactl store

This will basically save the changes you made.