This is actually a hardware shielding issue. You can work around it by lowering some of the volumes using a mixer application, but ultimately you should use different hardware.
** Changed in: alsa-driver (Ubuntu) Status: New => Invalid -- Whistling speaker, sound card https://bugs.launchpad.net/bugs/660881 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