#15 says problem went away but is on Kernel 4.4 and Kerne 4.8 where message was "hacked" to not display. With kernels 4.9, 4.10, etc. the message reappears as per bug report here: https://bugzilla.kernel.org/show_bug.cgi?id=193531
#17 closing this bug based upon #15 should be reconsidered. Also note this bug is a duplicate of: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1690502 which has fewer subscribers but more accurate information. There is a third duplicate bug report in launchpad which I don't have the link for just now. ** Bug watch added: Linux Kernel Bug Tracker #193531 https://bugzilla.kernel.org/show_bug.cgi?id=193531 -- 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/1584407 Title: ACPI Error: [\_SB_.PCI0.XHC_.RHUB.HS11] Namespace lookup failure, AE_NOT_FOUND (20150930/dswload-210) Status in linux package in Ubuntu: Invalid Bug description: [ 0.016192] ACPI Error: [\_SB_.PCI0.XHC_.RHUB.HS11] Namespace lookup failure, AE_NOT_FOUND (20150930/dswload-210) [ 0.016195] ACPI Exception: AE_NOT_FOUND, During name lookup/catalog (20150930/psobject-227) [ 0.016222] ACPI Exception: AE_NOT_FOUND, (SSDT:xh_rvp08) while loading table (20150930/tbxfload-193) [ 0.021348] ACPI Error: 1 table load failures, 7 successful (20150930/tbxfload-214) I have noticed this ACPI error persisting in my syslog and dmesg. Based on what I have learnt from ACPI, acpitool -w and lspci, I think the error is related to Namespaces provided in the DDST on \_SB_.PCI0.XHC_.RHUB.HS11, which I think concerns the Root → System bus tree → PCI bus → USB controller: Intel Corporation Sunrise Point-H USB 3.0 xHCI Controller (rev 31) in my system. I have not found what .RHUB.HS11 refers too. I have tried changing my UEFI USB settings but to no avail. Appreciate help to fix this bug. I reported it as a question https://answers.launchpad.net/ubuntu/+question/293489 and to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1553690. https://launchpad.net/~penalvch advice me to make this ubuntu-bug report. $ lsb_release -rd Description: Ubuntu 16.04 LTS Release: 16.04 $ uname -r 4.4.0-22-generic MB Bios: ASUS z170m-plus version 0704 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-22-generic 4.4.0-22.40 ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8 Uname: Linux 4.4.0-22-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: sunbear1604 1905 F.... pulseaudio /dev/snd/controlC0: sunbear1604 1905 F.... pulseaudio CurrentDesktop: Unity Date: Sun May 22 07:48:53 2016 HibernationDevice: RESUME=UUID=c1eef599-9978-461e-a399-a04370b6ae59 InstallationDate: Installed on 2016-05-01 (20 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) IwConfig: enp0s31f6 no wireless extensions. lo no wireless extensions. MachineType: System manufacturer System Product Name ProcFB: 0 EFI VGA 1 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-22-generic.efi.signed root=UUID=69a55da3-4a70-4239-8e7e-2430ceac525d ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-22-generic N/A linux-backports-modules-4.4.0-22-generic N/A linux-firmware 1.157 RfKill: SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/18/2016 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 0704 dmi.board.asset.tag: Default string dmi.board.name: Z170M-PLUS dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Default string dmi.chassis.type: 3 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0704:bd02/18/2016:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnZ170M-PLUS:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1584407/+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