I have been a bit busy but I finally got a chance to test this with some newer kernels. I tested v3.17-rc3-utopic and v3.17-rc4-utopic kernels. Internal speakers still do not work and the headphone fix stopped working in both of these kernels.
** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1355984 Title: Built in speakers do not work on iMac 14,2 Status in “alsa-driver” package in Ubuntu: New Status in “linux” package in Ubuntu: Fix Committed Bug description: Xubuntu 14.04 on iMac 14,2 no sound from internal speakers. Loud and clear using OSX 10.9.4. Also tried installing Lubuntu (no sound at all) Linux Mint 16 & 17 and Ubuntu 13.04, 13.10 (same problem as Xubuntu). Have all PulseAudio utils installed, all devices are listed but only analogue volume meter shows outputs when playing but as above nothing from speakers. AlsaMixer shows S/PDIF (highlighted), SPDIF 1 & S/PDIF 2 not MM, set at 00 but cannot be adjusted. To get the headphones to work I upgraded to the daily ALSA snapshot found here: https://code.launchpad.net/~ubuntu-audio- dev/+archive/ubuntu/alsa-daily/+packages The output of alsa-info.sh is here: http://www.alsa-project.org/db/?f=08cf13552b70232c96fea9293fdd54066243d79a I have downloaded the HDA Analyzer tool but I can't seem to get the internal speakers to work correctly in any consistent way, although they do occasionally work correctly for a few seconds. I can consistently make sound come from the speakers if I chose VREF = 50 or 80 in Node[0x0d]pin but it sounds like I am using a much smaller lower quality speaker when I do that. Here is the text dump for that node configuration: Node 0x0d [Pin Complex] wcaps 0x41048b: Stereo Amp-In Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0 Amp-In vals: [0x00 0x00] Pincap 0x00001764: IN Detect Balance Vref caps: HIZ 50 GRD 80 Pin Default 0x400000f0: [N/A] Line Out at Ext N/A Conn = Unknown, Color = Unknown DefAssociation = 0xf, Sequence = 0x0 Unsolicited: tag=0x00, enabled=0 Power: setting=D0, actual=D0 Delay: 1 samples WORKAROUND for the headphones only: # echo "options snd-hda-intel model=imac27_122" >> /etc/modprobe.d/imac_local.conf followed by a reboot. --- ApportVersion: 2.14.1-0ubuntu3.3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: ladmin 1910 F.... pulseaudio /dev/snd/controlC0: ladmin 1910 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 14.04 InstallationDate: Installed on 2014-08-11 (1 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) MachineType: Apple Inc. iMac14,2 NonfreeKernelModules: wl Package: linux (not installed) ProcFB: 0 nouveaufb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-33-generic.efi.signed root=UUID=2f77d057-5c9c-42d8-b2c0-18507f43420e ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.13.0-33.58-generic 3.13.11.4 RelatedPackageVersions: linux-restricted-modules-3.13.0-33-generic N/A linux-backports-modules-3.13.0-33-generic N/A linux-firmware 1.127.5 Tags: trusty trusty Uname: Linux 3.13.0-33-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 03/14/2014 dmi.bios.vendor: Apple Inc. dmi.bios.version: IM142.88Z.0118.B02.1403141302 dmi.board.asset.tag: Base Board Asset Tag# dmi.board.name: Mac-27ADBB7B4CEE8E61 dmi.board.vendor: Apple Inc. dmi.board.version: iMac14,2 dmi.chassis.type: 13 dmi.chassis.vendor: Apple Inc. dmi.chassis.version: Mac-27ADBB7B4CEE8E61 dmi.modalias: dmi:bvnAppleInc.:bvrIM142.88Z.0118.B02.1403141302:bd03/14/2014:svnAppleInc.:pniMac14,2:pvr1.0:rvnAppleInc.:rnMac-27ADBB7B4CEE8E61:rvriMac14,2:cvnAppleInc.:ct13:cvrMac-27ADBB7B4CEE8E61: dmi.product.name: iMac14,2 dmi.product.version: 1.0 dmi.sys.vendor: Apple Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1355984/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp