I have the exact same problem as described in the last post by Josh Kupershmidt. The sounds works with USB headphones, meaning that all the codecs are set up properly.
-- [Jaunty] No sound output by default with MacBook 5.1 https://bugs.launchpad.net/bugs/337947 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