ACPI error spams log every four seconds

[Jason Duerstock]

I am getting the following error in dmesg roughly every four seconds:

[ 986.360425] ACPI Error: Operand must be Buffer/Integer/String/Package - found type Method (20150930/exoparg1-763)
[ 986.360473] ACPI Error: Method parse/execution failed [\_SB.TCHG.PPPC] (Node ffff8800799090a0), AE_AML_OPERAND_TYPE (20150930/psparse-542)
[ 990.367100] ACPI Error: Operand must be Buffer/Integer/String/Package - found type Method (20150930/exoparg1-763)
[ 990.367148] ACPI Error: Method parse/execution failed [\_SB.TCHG.PPPC] (Node ffff8800799090a0), AE_AML_OPERAND_TYPE (20150930/psparse-542)
[ 994.376094] ACPI Error: Operand must be Buffer/Integer/String/Package - found type Method (20150930/exoparg1-763)
[ 994.376146] ACPI Error: Method parse/execution failed [\_SB.TCHG.PPPC] (Node ffff8800799090a0), AE_AML_OPERAND_TYPE (20150930/psparse-542)

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-38-generic 4.4.0-38.57
ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19
Uname: Linux 4.4.0-38-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
Date: Mon Sep 19 23:03:07 2016
HibernationDevice: RESUME=UUID=5d0ad9c7-d401-4f28-8532-afa6e7ef5f71
InstallationDate: Installed on 2016-09-20 (0 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
IwConfig:
 enxc44eac806675 no wireless extensions.

 lo no wireless extensions.
MachineType: N/A CherryTrail
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-38-generic.efi.signed root=/dev/mmcblk0p2 ro quiet splash vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-38-generic N/A
 linux-backports-modules-4.4.0-38-generic N/A
 linux-firmware 1.157.3
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/06/2016
dmi.bios.vendor: N/A.
dmi.bios.version: YT8.2x64.001
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: Type2 - Board Product Name
dmi.board.vendor: N/A
dmi.board.version: Type2 - Board Version
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnN/A.:bvrYT8.2x64.001:bd01/06/2016:svnN/A:pnCherryTrail:pvrType1-TBDbyOEM:rvnN/A:rnType2-BoardProductName:rvrType2-BoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.name: CherryTrail
dmi.product.version: Type1 - TBD by OEM
dmi.sys.vendor: N/A

[Brad Figg (brad-figg)]

This change was made by a bot.

[Jason Duerstock (evilmoo)]

For what it's worth, I still get the same error from 4.8.0-14 from the Yakkety Yak preview.

[Joseph Salisbury (jsalisbury)]

Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.8 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]