ftp://download.nvidia.com/XFree86/gpu-hdmi-audio-document/gpu-hdmi- audio.html
6.1.2. Chipset with 8-channel support, single stream Chipset supporting stereo and 1 stream This configuration is used in MCP77, MCP78, MCP79, MCP7A, and ION. In the case where multiple HDMI display connectors are present, the audio stream is broadcast to all HDMI connectors at once. A single ALSA device is exposed. ELD and PD information is not available on these chipsets. In these chipsets, the multiple 2-channel converters are aggregated by the ALSA driver and exposed as a single 8-channel device. Some chipsets support 2, or 8 channels (MCP77). Other chipsets support 2, 6, or 8 channels (MCP79). -- 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/1256646 Title: [System Product Name, Nvidia MCP77/78 HDMI, Digital Out, HDMI] No sound at all Status in “alsa-driver” package in Ubuntu: New Bug description: Sound stopped working on upgrade from 13.4 to 13.10. Up until then, sound via HDMI worked fine. Now, I get no sound through HDMI. Checked the Sound Settings and alsa mixer and everything looks fine. If I hook up speakers to the microphone port I get sound. I used "ubuntu-bug -s audio" to report this bug (very nice BTW). If there is any additional information you need or anything you would like me to try, I am game for it. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: alsa-base 1.0.25+dfsg-0ubuntu4 ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6 Uname: Linux 3.11.0-13-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.12.5-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ray 2389 F.... pulseaudio /dev/snd/controlC1: ray 2389 F.... pulseaudio Date: Sun Dec 1 09:35:49 2013 InstallationDate: Installed on 2011-10-02 (791 days ago) InstallationMedia: Edubuntu 11.04 "Natty Narwhal" - Release amd64 (20110426) MarkForUpload: True PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:NVidia failed Symptom_Card: Built-in Audio - HDA NVidia Symptom_DevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ray 2389 F.... pulseaudio /dev/snd/controlC1: ray 2389 F.... pulseaudio Symptom_Jack: Digital Out, HDMI Symptom_Type: No sound at all Title: [System Product Name, Nvidia MCP77/78 HDMI, Digital Out, HDMI] No sound at all UpgradeStatus: Upgraded to saucy on 2013-11-03 (27 days ago) dmi.bios.date: 04/09/2009 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1009 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: M3N78-VM dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1009:bd04/09/2009:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM3N78-VM:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1256646/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
