Nice, just check now with a clean installation and "automute" trick is not needed anymore. So, with the patch the iMac 9,1 sound works without any trick or tweak... just perfect!
** Patch added: "linux-imac91-sound.patch" https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1033233/+attachment/3430869/+files/linux-imac91-sound.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1033233 Title: [iMac9,1, Realtek ALC889A, Speaker, Internal] No sound at all with kernel 3.5.0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1033233/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs