I'm using Ubuntu 13.1064b on a Dell Inspiron N5010.
Sometimes when I boot into Ubuntu, I get a continuous beeping noise on my sound card output. My laptop's internal speakers stopped working a long time ago, so I have no way of confirming if it's an issue with the audio output.
This noise starts only after Ubuntu boots, for I can hear it only after I select Ubuntu from the GRUB.
Shutting down the system and rebooting once works sometimes, but other times it takes multiple reboots for the beeping to stop.
I'm a real beginner. How do I go about solving this?