I noticed that Linux Mint 15 XFCE on my Acer Aspire One ZG5 netbook gave an annoying double "click-click" sound from the speaker - on its own without anything running. I thought this would go away after a real install, however, after an install + full upgrade, that double "click-click" persists. It comes about every 4-6 minutes and is very annoying. My Linux Mint 15 KDE install on another laptop works fine but the XFCE one somehow has this behavior.
I checked dmesg for any errors but it records nothing when the clicks occur.
The sound settings on panel show this as an Intel HDA. One of the posts suggested this may be a "PC Speaker Beep" so I turned that down to zero in the sound settings but the mystery continues.
Has anyone faced this? How do I fix this???