So I updated one of my servers to Ubuntu 9.10 recently (I like to stay back from the bleeding edge), and it took me a while to realize that somewhere in there — possibly in the recent kernel update — my system beep went away. A little searching showed that a lot of people hate the system beep and were looking ways to turn it off. Fair enough, but apparently Ubuntu thought that it was a good idea to turn off the system beep by default. Bad Ubuntu!
To fix this, I did
and to make this stick at reboot, I had to un-blacklist the 'pcspkr' module, which I did by removing the
line in /etc/modprobe.d/blacklist.conf.