I would like to add some information to this bug report, which may or may not be relevant. There seems to be a general problem with HDMI audio in recent kernel versions. I am using Debian kernel packages, on an AMD64 system with a Radeon R9-280 video card:
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tahiti PRO [Radeon HD 7950/8950 OEM / R9 280] 01:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Tahiti HDMI Audio [Radeon HD 7870 XT / 7950/7970] My experience has been as follows: Linux v4.6.4 -- HDMI audio works Linux v4.9.2 -- HDMI audio works Linux v4.9.6 -- HDMI audio does not work There were also problems with kernel versions 4.7 and 4.8. I had the impression that it was intermittent; sometimes when the audio did not work, a reboot or power cycle into the same kernel version would make it start working. It appears that with my hardware, Linux v4.6 was completely reliable; more recent versions are substantially less so, or even completely broken. (I'm not exactly sure whether v4.9.2 always worked, or only most of the time.) I hope this information is useful in locating the specific source of the problem. <ian_br...@mail.ru> -- 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/1657994 Title: Regression: HDMI audio produces no sound (Skylake NUC) Status in linux package in Ubuntu: Confirmed Status in linux source package in Yakkety: Confirmed Bug description: After upgrade from Xenial 16.04 to Yakkety 16.10, playing audio over HDMI no longer produces sound. * When booting with old kernel from Xenial (4.4.0-59), HDMI audio works fine * Audio from headphone jack works fine * Userspace seems to be happily playing to HDMI audio device, but no sound produced at HDMI sink (Samsung TV) Any of a wide range of pre-built mainline kernels fail to produce HDMI audio, but with a different failure mode (HDMI audio does not seem to be enumerated in the same way as in the Ubuntu kernels.) ProblemType: Bug DistroRelease: Ubuntu 16.10 Package: linux-image-4.8.0-34-generic 4.8.0-34.36 ProcVersionSignature: Ubuntu 4.8.0-34.36-generic 4.8.11 Uname: Linux 4.8.0-34-generic x86_64 ApportVersion: 2.20.3-0ubuntu8.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: israel 1973 F.... pulseaudio /dev/snd/controlC1: israel 1973 F.... pulseaudio CurrentDesktop: Unity Date: Fri Jan 20 08:58:35 2017 HibernationDevice: RESUME=UUID=ca27f739-071f-4c25-974e-0d0f0614b21c InstallationDate: Installed on 2016-10-03 (108 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-34-generic.efi.signed root=UUID=90c3e094-e890-4c35-a0d2-0a358f5d2430 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.8.0-34-generic N/A linux-backports-modules-4.8.0-34-generic N/A linux-firmware 1.161.1 SourcePackage: linux UpgradeStatus: Upgraded to yakkety on 2017-01-13 (6 days ago) dmi.bios.date: 06/03/2016 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: KYSKLi70.86A.0037.2016.0603.1032 dmi.board.name: NUC6i7KYB dmi.board.vendor: Intel Corporation dmi.board.version: H90766-405 dmi.chassis.type: 3 dmi.chassis.vendor: Intel Corporation dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrKYSKLi70.86A.0037.2016.0603.1032:bd06/03/2016:svn:pn:pvr:rvnIntelCorporation:rnNUC6i7KYB:rvrH90766-405:cvnIntelCorporation:ct3:cvr1.0: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1657994/+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
