Kernel behavior summary:
Ubuntu 4.4.0-59: HDMI audio works properly
Mainline 4.4 (any): i915 drm driver does not seem to support Skylake,
HDMI audio not enumerated
All of the below kernels exhibit the same problem: HDMI produces no sound
Mainline 4.5rc1
Mainline 4.5 final
Mainline 4.6 final
Mainline 4.7 final
Mainline 4.8 final
Ubuntu 4.8.0-34
Mainline 4.9 final
Mainline 4.10rc5
>From here, it's not clear to me how to bisect between the working kernel
and any of the not-working kernels without breaking the back-ported i915
driver along the way.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1657994
Title:
Regression: HDMI audio produces no sound (Skylake NUC)
Status in linux package in Ubuntu:
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:
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