[Bug 1933707] Re: Many ACPI errors

There are two types of ACPI errors: AE_NOT_FOUND and AE_ALREADY_EXISTS,
and both of them are the result of BIOS bugs


AE_NOT_FOUND: BIOS declares but does not defines them, and accessing them generates failures - this includes both USB port and touchpad declaration.

AE_ALREADY_EXISTS: BIOS defines the same variables twice and kernel
complains when it parses the second one.

These must be fixed in BIOS so you need to report to Acer, and nothing
can be done in Linux kernel. Having say that, these BIOS code can be for
dummy devices. If you aren't seeing USB ports and touch failures, they
can be safely ignored.

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https://bugs.launchpad.net/bugs/1933707

Title:
Many ACPI errors

Status in linux package in Ubuntu:
New

Bug description:
Many ACPI errors in dmesg

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: linux-image-5.11.0-23-generic 5.11.0-23.24
ProcVersionSignature: Ubuntu 5.11.0-23.24-generic 5.11.22
Uname: Linux 5.11.0-23-generic x86_64
ApportVersion: 2.20.11-0ubuntu65.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: kimathi 1338 F.... pulseaudio
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sat Jun 26 04:03:56 2021
InstallationDate: Installed on 2021-04-25 (61 days ago)
InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
MachineType: Acer Aspire A515-56
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-23-generic root=UUID=0c5f066e-35cd-4f76-a271-a1c97ba74ee3 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.11.0-23-generic N/A
linux-backports-modules-5.11.0-23-generic N/A
linux-firmware 1.197.2
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/26/2021
dmi.bios.release: 1.12
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V1.12
dmi.board.asset.tag: Type2 - Board Chassis Location
dmi.board.name: Iris_TL
dmi.board.vendor: TGL
dmi.board.version: V1.12
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.12
dmi.ec.firmware.release: 1.12
dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.12:bd05/26/2021:br1.12:efr1.12:svnAcer:pnAspireA515-56:pvrV1.12:rvnTGL:rnIris_TL:rvrV1.12:cvnAcer:ct10:cvrV1.12:
dmi.product.family: Aspire 5
dmi.product.name: Aspire A515-56
dmi.product.sku: 0000000000000000
dmi.product.version: V1.12
dmi.sys.vendor: Acer

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