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. -- 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/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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1933707/+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
