Public bug reported:
Hi.
I'm running Ubuntu MATE 16.04 running kernel `4.4.0-128-generic`.
Since applying updates this morning I'm now unable to shut my machine
down cleanly. If I shut down or restart, the error
`snd_hda_codec_realtek hdaudioC0D0: unable to sync register` is output 3
times and the machine doesn't power down. I have to finish the shutdown
manually by holding the power button.
Wasn't sure which debug steps to follow for this error, but this is the
corresponding extract from `/var/log/kern.log`:
```
Jun 22 21:14:04 leonard kernel: [ 37.378508] snd_hda_codec_hdmi hdaudioC0D2:
Unable to sync register 0x2f0d00. -5
Jun 22 21:14:04 leonard kernel: [ 37.378876] snd_hda_codec_hdmi hdaudioC0D2:
HDMI: invalid ELD buf size -1
Jun 22 21:14:04 leonard kernel: [ 37.379239] snd_hda_codec_hdmi hdaudioC0D2:
HDMI: invalid ELD buf size -1
Jun 22 21:14:04 leonard kernel: [ 37.379602] snd_hda_codec_hdmi hdaudioC0D2:
HDMI: invalid ELD buf size -1
Jun 22 21:14:04 leonard kernel: [ 37.405753] snd_hda_codec_realtek
hdaudioC0D0: Unable to sync register 0x2b8000. -5
Jun 22 21:14:04 leonard kernel: [ 37.405873] snd_hda_codec_realtek
hdaudioC0D0: Unable to sync register 0x2b8000. -5
Jun 22 21:14:04 leonard NetworkManager[904]: <info> [1529698444.9269]
ModemManager disappeared from bus
```
I made the report using `ubuntu-bug linux` so hopefully this will
provide the necessary debug info. If I need to post more info, let me
know what you need.
Thanks
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-128-generic 4.4.0-128.154
ProcVersionSignature: Ubuntu 4.4.0-128.154-generic 4.4.131
Uname: Linux 4.4.0-128-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: chris 1660 F.... pulseaudio
CurrentDesktop: MATE
Date: Fri Jun 22 21:19:43 2018
HibernationDevice: RESUME=UUID=6bc8046c-253e-4b27-bb37-27d8e02c255d
InstallationDate: Installed on 2017-01-25 (513 days ago)
InstallationMedia: Ubuntu-MATE 16.04.1 LTS "Xenial Xerus" - Release amd64
(20160719)
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 5986:1112 Acer, Inc
Bus 001 Device 002: ID 8087:0a2b Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Notebook N24_25BU
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-128-generic.efi.signed
root=UUID=f03f5e5c-4a97-462b-8e17-63e66a434dc9 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.4.0-128-generic N/A
linux-backports-modules-4.4.0-128-generic N/A
linux-firmware 1.157.19
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/01/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 5.12
dmi.board.asset.tag: Tag 12345
dmi.board.name: N24_25BU
dmi.board.vendor: Notebook
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Notebook
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr5.12:bd12/01/2016:svnNotebook:pnN24_25BU:pvrNotApplicable:rvnNotebook:rnN24_25BU:rvrNotApplicable:cvnNotebook:ct10:cvrN/A:
dmi.product.name: N24_25BU
dmi.product.version: Not Applicable
dmi.sys.vendor: Notebook
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug xenial
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https://bugs.launchpad.net/bugs/1778274
Title:
snd_hda_codec_realtek hdaudioC0D0: Unable to sync register
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