I also have this issue with Cosmic (4.18.0-13) and also with the latest upstream kernel:
$ uname -a Linux alaptop 5.0.0-050000rc1-generic #201901062130 SMP Mon Jan 7 02:32:47 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 18.10 Release: 18.10 Codename: cosmic $ tail /var/log/syslog Jan 11 09:26:07 alaptop kernel: [ 44.303945] ACPI Error: Needed type [Reference], found [Integer] 0000000006c06c7b (20181213/exresop-69) Jan 11 09:26:07 alaptop kernel: [ 44.303975] ACPI Error: AE_AML_OPERAND_TYPE, While resolving operands for [Store] (20181213/dswexec-427) Jan 11 09:26:07 alaptop kernel: [ 44.304003] No Local Variables are initialized for Method [_Q50] Jan 11 09:26:07 alaptop kernel: [ 44.304009] No Arguments are initialized for method [_Q50] Jan 11 09:26:07 alaptop kernel: [ 44.304020] ACPI Error: Method parse/execution failed \_SB.PCI0.LPCB.H_EC._Q50, AE_AML_OPERAND_TYPE (20181213/psparse-531) -- 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/1738736 Title: ACPI error message flooding syslog Status in linux package in Ubuntu: Confirmed Bug description: This message : Dec 18 09:20:13 tignasse kernel: [ 85.652805] ACPI Error: Needed type [Reference], found [Integer] ffff99eae08481f8 (20170531/exresop-103) Dec 18 09:20:13 tignasse kernel: [ 85.652831] ACPI Exception: AE_AML_OPERAND_TYPE, While resolving operands for [OpcodeName unavailable] (20170531/dswexec-461) Dec 18 09:20:13 tignasse kernel: [ 85.652847] ACPI Error: Method parse/execution failed \_SB.PCI0.LPCB.H_EC._Q50, AE_AML_OPERAND_TYPE (20170531/psparse-550) Is flooding my syslog at a pace of on message every 200 ms ! This is really annoying. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: linux-image-4.13.0-19-generic 4.13.0-19.22 ProcVersionSignature: Ubuntu 4.13.0-19.22-generic 4.13.13 Uname: Linux 4.13.0-19-generic x86_64 ApportVersion: 2.20.7-0ubuntu3.6 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: alex 5166 F.... pulseaudio /dev/snd/controlC1: alex 5166 F.... pulseaudio CurrentDesktop: GNOME Date: Mon Dec 18 09:22:16 2017 HibernationDevice: RESUME=UUID=870c2fd1-8a8f-49bb-9bf4-dbefaa08e583 InstallationDate: Installed on 2015-11-10 (768 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) MachineType: Intel Corporation Skylake Platform ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-19-generic root=UUID=6814e3c1-8cea-4ecc-964d-535fd18782e9 ro quiet splash crashkernel=384M-:128M vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.13.0-19-generic N/A linux-backports-modules-4.13.0-19-generic N/A linux-firmware 1.169.1 SourcePackage: linux UpgradeStatus: Upgraded to artful on 2017-11-23 (24 days ago) dmi.bios.date: 11/06/2015 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 5.11 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: WhiteTip Mountain1 Fab2 dmi.board.vendor: Topstar dmi.board.version: RVP7 dmi.chassis.asset.tag: Default string dmi.chassis.type: 9 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr5.11:bd11/06/2015:svnIntelCorporation:pnSkylakePlatform:pvr0.1:rvnTopstar:rnWhiteTipMountain1Fab2:rvrRVP7:cvnDefaultstring:ct9:cvrDefaultstring: dmi.product.family: Skylake System dmi.product.name: Skylake Platform dmi.product.version: 0.1 dmi.sys.vendor: Intel Corporation To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738736/+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
