On further exploration, it seems that each level of the channel has its own peculiar noise. The oscillation is at level 0, but the following levels are extremely noisy: 8, 17, 27, 36, 45, 55, 64, 73, 83, 92. It's reproducible to get the noise on each of these levels.
I did not experience this noise before the patch, using the default ALSA that shipped with Jaunty, and the option of snd_hda_intel model=mbp3. -- Left speaker doesn't work, controls mixed up on Apple MacBook[Pro] (5,1) https://bugs.launchpad.net/bugs/337314 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