I have this problem with two different (but similar) desktop computers running Ubuntu 9.04. The problem was present in at least the two previous major version of Ubuntu, but were much less frequent.
Actually before 9.04 it only seemed to happen a couple of seconds before I receive a phone call or a SMS on my cellphone. I didn't report the bug because, well I thought it was somewhat cool to know when your phone is about to ring. However since I updated to 9.04 it happens randomly quite often, most of the time when a lot of CPU is being used. It's bit like a buzzing morse code, always the same tone, the same rhythm and it sound exactly the same on both computers and ends up with a little fade out. Linux h3-workstation 2.6.28-11-server #42-Ubuntu SMP Fri Apr 17 02:48:10 UTC 2009 i686 GNU/Linux apt-cache policy alsa-base alsa-base: Installed: 1.0.18.dfsg-1ubuntu8 Candidate: 1.0.18.dfsg-1ubuntu8 Version table: *** 1.0.18.dfsg-1ubuntu8 0 500 http://ubuntu.mirror.rafal.ca jaunty/main Packages 100 /var/lib/dpkg/status -- intermitten buzzing from speakers using hda-intel alsa on dell mini 9 jaunty netbook remix https://bugs.launchpad.net/bugs/342946 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs