Error: Driver 'pcspkr' is already registered, aborting...

If you are experiencing the following complain during the boot (see /var/log/kern.log):

Dec 14 17:08:40 deby kernel: [    5.973561] Error: 
Driver 'pcspkr' is already registered, aborting...

Issue the following command and reboot:

echo 'blacklist snd-pcsp' >> \
    /etc/modprobe.d/blacklist.conf