Comment 140 for bug 418627

RE my post on the 31st of october ( #84 ) and my problems with sound. i have found the solution and it was the sl-modem proprietary driver:

https://bugs.launchpad.net/ubuntu/+source/sl-modem/+bug/449762

disabling it (in the hardware drivers tool in the administration menu) and restoring my pulesaudio configuration files to their original state overcame the problem.

its interesting that nusret's post from the 28th of october also worked, although requiring manual edits to files.

just posting here in case anyone else has experienced this problem.