** Tags added: kernel-bug-exists-upstream -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1355984
Title: Built in speakers do not work on iMac 14,2 and iMac 14,4 Status in “alsa-driver” package in Ubuntu: New Status in “linux” package in Ubuntu: Confirmed Bug description: No sound from internal speakers but OK from plugged in headphones. Running Xubuntu 14.04 on partitioned iMac 14,4 which has Intel HD Audio (S/PDIF DigitalAudio output). Headphones appear to be using analogue output. Both loud and clear using OSX 10.9.4. Have tried all fixes found on many Linux distro websites but no success. 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. What is the problem? I sense there is a simple solution here, if only to ger the analogue output via the internal speakers. This is reminiscent of problemsI I had with Unbuntu 12.04 on an earlier iMac which were solved simply using AlsaMixer. That I have installed Ubuntu on my new iMac shows how much I prefer Linux to OSX, this small problem is spoiling my enjoyment of your great OS. Thank you in anticipation. Ed Hughes I have the same issue on an iMac 14,2. I think the audio hardware in the iMac 14,2 and 14,4 is probably the same. 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 Neither the headphones or the internal speakers work with the default configuration so I did this: # echo "options snd-hda-intel model=imac27_122" >> /etc/modprobe.d/imac_local.conf followed by a reboot. This fix works on every other Mac I have tested so far, but for this machine it only fixes the headphone audio. 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 The audio related parts of the output of # sudo lspci -vvnn is: 00:1b.0 Audio device [0403]: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller [8086:8c20] (rev 05) Subsystem: Intel Corporation Device [8086:7270] Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 256 bytes Interrupt: pin A routed to IRQ 51 Region 0: Memory at b1c10000 (64-bit, non-prefetchable) [size=16K] Capabilities: [50] Power Management version 2 Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+ Address: 00000000fee003f8 Data: 0000 Capabilities: [70] Express (v1) Root Complex Integrated Endpoint, MSI 00 DevCap: MaxPayload 128 bytes, PhantFunc 0 ExtTag- RBE- DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported- RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop- MaxPayload 128 bytes, MaxReadReq 128 bytes DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend- Capabilities: [100 v1] Virtual Channel Caps: LPEVC=0 RefClk=100ns PATEntryBits=1 Arb: Fixed- WRR32- WRR64- WRR128- Ctrl: ArbSelect=Fixed Status: InProgress- VC0: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans- Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256- Ctrl: Enable+ ID=0 ArbSelect=Fixed TC/VC=01 Status: NegoPending- InProgress- VC1: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans- Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256- Ctrl: Enable+ ID=2 ArbSelect=Fixed TC/VC=04 Status: NegoPending- InProgress- Kernel driver in use: snd_hda_intel 01:00.1 Audio device [0403]: NVIDIA Corporation GK104 HDMI Audio Controller [10de:0e0a] (rev a1) Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 256 bytes Interrupt: pin B routed to IRQ 17 Region 0: Memory at b1080000 (32-bit, non-prefetchable) [size=16K] Capabilities: [60] Power Management version 3 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME- Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+ Address: 0000000000000000 Data: 0000 Capabilities: [78] Express (v2) Endpoint, MSI 00 DevCap: MaxPayload 256 bytes, PhantFunc 0, Latency L0s unlimited, L1 <64us ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset- DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported- RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+ MaxPayload 256 bytes, MaxReadReq 512 bytes DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend- LnkCap: Port #0, Speed 8GT/s, Width x16, ASPM L0s L1, Exit Latency L0s <512ns, L1 <4us ClockPM+ Surprise- LLActRep- BwNot- LnkCtl: ASPM L0s L1 Enabled; RCB 64 bytes Disabled- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 2.5GT/s, Width x16, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- DevCap2: Completion Timeout: Range AB, TimeoutDis+, LTR-, OBFF Not Supported DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete+, EqualizationPhase1+ EqualizationPhase2+, EqualizationPhase3+, LinkEqualizationRequest+ Kernel driver in use: snd_hda_intel --- 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. 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