I'd like to perform a bisect to figure out what commit caused this regression. We need to identify the earliest kernel where the issue started happening as well as the latest kernel that did not have this issue.
Can you test the following kernels and report back? We are looking for the first kernel version that exhibits this bug: 4.5 final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.5-wily/ 4.6 final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6-yakkety/ 4.7 final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.7/ 4.8-rc1: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8-rc1/ You don't have to test every kernel, just up until the kernel that first has this bug. Thanks in advance! ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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: Incomplete 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
