Okay, another thing to try is to install newer sound drivers according to https://wiki.ubuntu.com/DebuggingSoundProblems/KarmicCaveats#Sound%20drivers%20need%20to%20be%20updated
** Package changed: pulseaudio (Ubuntu) => linux (Ubuntu) -- Regular crackling sound on ThinkPad R61 https://bugs.launchpad.net/bugs/500987 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
