An ACPI exceptions on dmesg output

[ 0.068654] ACPI Exception: Could not find/resolve named package element: LNKA (20170831/dspkginit-381)
[ 0.068675] ACPI Exception: Could not find/resolve named package element: LNKB (20170831/dspkginit-381)
[ 0.068694] ACPI Exception: Could not find/resolve named package element: LNKC (20170831/dspkginit-381)
[ 0.068712] ACPI Exception: Could not find/resolve named package element: LNKD (20170831/dspkginit-381)
[ 0.068730] ACPI Exception: Could not find/resolve named package element: LNKA (20170831/dspkginit-381)
[ 0.068747] ACPI Exception: Could not find/resolve named package element: LNKA (20170831/dspkginit-381)
[ 0.068765] ACPI Exception: Could not find/resolve named package element: LNKA (20170831/dspkginit-381)
[ 0.068782] ACPI Exception: Could not find/resolve named package element: LNKA (20170831/dspkginit-381)
[ 0.068800] ACPI Exception: Could not find/resolve named package element: LNKB (20170831/dspkginit-381)
[ 0.068817] ACPI Exception: Could not find/resolve named package element: LNKC (20170831/dspkginit-381)
[ 0.068835] ACPI Exception: Could not find/resolve named package element: LNKD (20170831/dspkginit-381)
[ 0.068853] ACPI Exception: Could not find/resolve named package element: LNKA (20170831/dspkginit-381)
[ 0.068870] ACPI Exception: Could not find/resolve named package element: LNKB (20170831/dspkginit-381)

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-43-generic 4.15.0-43.46
ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
Uname: Linux 4.15.0-43-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ake 3190 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Fri Dec 28 21:30:26 2018
InstallationDate: Installed on 2018-11-10 (48 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
MachineType: Dell Inc. XPS 15 9570
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-43-generic root=UUID=6065af70-7d4d-460c-ba11-8229da1072f0 ro nouveau.blacklist=1 quiet splash vt.handoff=1
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-43-generic N/A
 linux-backports-modules-4.15.0-43-generic N/A
 linux-firmware 1.173.2
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/02/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.6.0
dmi.board.name: 0D0T05
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.6.0:bd11/02/2018:svnDellInc.:pnXPS159570:pvr:rvnDellInc.:rn0D0T05:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: XPS
dmi.product.name: XPS 15 9570
dmi.sys.vendor: Dell Inc.