ACPI consists of many tables. Two types of them are DSDT and SSDT. DSDT is mandatory, and SSDTs are addon to DSDT and are optional. SSDT is / can be loaded according to hardware config during boot time. In the case of this system, the ACPI objects that are erroneous are both declared in DSDT and a SSDT (i.e. SSDT6 if you extract from acpi.log). It seems to be that contents of SSDT6 are almost copied to DSDT and it should not be loaded at all.
Fortunately, most of the duplicated objects (methods) are very similar, if not identical, to their clones in DSDT. When kernel parses SSDT6, it found these objects already exist and stopped loading them. This does not cause functional loss so there is nothing to worry about. A fix must be done in BIOS, but a workaround is to modify SSDT6 and override it with ACPI override by Linux kernel; however, the later would "taint" the kernel and it would also be a overkill when nothing is broken. -- 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/1877870 Title: ACPI errors Status in linux package in Ubuntu: Confirmed Bug description: Hi, i have a bunch of acpi errors showing up on the log. this one repeats a lot: ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.XHC.RHUB.SS09._UPC], AE_ALREADY_EXISTS (20190816/dswload2-323) my bios is updated (from windows, on april 3, 2020) currently running ubuntu 20.04 with kernel 5.4.0-29-generic ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.4.0-29-generic 5.4.0-29.33 ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30 Uname: Linux 5.4.0-29-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: pkillpeers 1879 F.... pulseaudio /dev/snd/controlC0: pkillpeers 1879 F.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Sun May 10 16:24:50 2020 InstallationDate: Installed on 2020-05-07 (3 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 0408:5300 Quanta Computer, Inc. HP Wide Vision HD Camera Bus 001 Device 002: ID 046d:c07e Logitech, Inc. G402 Gaming Mouse Bus 001 Device 004: ID 8087:0aaa Intel Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: HP OMEN by HP Laptop 15-dc0xxx ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-29-generic root=UUID=c93b8267-6fe4-492f-ad94-1252537b50fb ro RelatedPackageVersions: linux-restricted-modules-5.4.0-29-generic N/A linux-backports-modules-5.4.0-29-generic N/A linux-firmware 1.187 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/23/2020 dmi.bios.vendor: AMI dmi.bios.version: F.12 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: 84DB dmi.board.vendor: HP dmi.board.version: 93.24 dmi.chassis.type: 10 dmi.chassis.vendor: HP dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAMI:bvrF.12:bd03/23/2020:svnHP:pnOMENbyHPLaptop15-dc0xxx:pvr:rvnHP:rn84DB:rvr93.24:cvnHP:ct10:cvrChassisVersion: dmi.product.family: 103C_5335KV HP OMEN dmi.product.name: OMEN by HP Laptop 15-dc0xxx dmi.product.sku: 4ML16EA#AB9 dmi.sys.vendor: HP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1877870/+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
