Public bug reported: I have a Skylake Core i7 system running up-to-date 16.04.1 (4.4 kernel).
Whenever I issue a halt (either shutdown -h now, or halt) the shutdown process gets as far as showing the "Target shutdown reached" on the console, but instead of actually powering the system down, it just sits there idling. I have to manually power the system off by holding the power button down. What should happen, is that 'shutdown -h now' should actually shut the OS down and power the computer off without any further intervention. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-83-generic 4.4.0-83.106 ProcVersionSignature: Ubuntu 4.4.0-83.106-generic 4.4.70 Uname: Linux 4.4.0-83-generic x86_64 NonfreeKernelModules: zfs zunicode zcommon znvpair zavl ApportVersion: 2.20.1-0ubuntu2.9 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: bladernr 28322 F.... pulseaudio /dev/snd/pcmC0D0p: bladernr 28322 F...m pulseaudio /dev/snd/controlC0: bladernr 28322 F.... pulseaudio CurrentDesktop: Unity Date: Thu Jul 13 17:42:14 2017 HibernationDevice: RESUME=UUID=0ca350ae-0a5d-4d84-9ac5-f0f83959aa62 InstallationDate: Installed on 2016-02-11 (518 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160210) MachineType: Gigabyte Technology Co., Ltd. Z170MX-Gaming 5 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-83-generic.efi.signed root=UUID=fa272e99-2333-4360-a2f3-edbde23a1fed ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-83-generic N/A linux-backports-modules-4.4.0-83-generic N/A linux-firmware 1.157.11 RfKill: SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/16/2015 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: F3 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: Z170MX-Gaming 5 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF3:bd10/16/2015:svnGigabyteTechnologyCo.,Ltd.:pnZ170MX-Gaming5:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ170MX-Gaming5:rvrx.x:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: Z170MX-Gaming 5 dmi.product.version: To be filled by O.E.M. dmi.sys.vendor: Gigabyte Technology Co., Ltd. ** Affects: linux (Ubuntu) Importance: Undecided Status: Confirmed ** Tags: amd64 apport-bug xenial -- 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/1704232 Title: Halt doesn't power system down Status in linux package in Ubuntu: Confirmed Bug description: I have a Skylake Core i7 system running up-to-date 16.04.1 (4.4 kernel). Whenever I issue a halt (either shutdown -h now, or halt) the shutdown process gets as far as showing the "Target shutdown reached" on the console, but instead of actually powering the system down, it just sits there idling. I have to manually power the system off by holding the power button down. What should happen, is that 'shutdown -h now' should actually shut the OS down and power the computer off without any further intervention. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-83-generic 4.4.0-83.106 ProcVersionSignature: Ubuntu 4.4.0-83.106-generic 4.4.70 Uname: Linux 4.4.0-83-generic x86_64 NonfreeKernelModules: zfs zunicode zcommon znvpair zavl ApportVersion: 2.20.1-0ubuntu2.9 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: bladernr 28322 F.... pulseaudio /dev/snd/pcmC0D0p: bladernr 28322 F...m pulseaudio /dev/snd/controlC0: bladernr 28322 F.... pulseaudio CurrentDesktop: Unity Date: Thu Jul 13 17:42:14 2017 HibernationDevice: RESUME=UUID=0ca350ae-0a5d-4d84-9ac5-f0f83959aa62 InstallationDate: Installed on 2016-02-11 (518 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160210) MachineType: Gigabyte Technology Co., Ltd. Z170MX-Gaming 5 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-83-generic.efi.signed root=UUID=fa272e99-2333-4360-a2f3-edbde23a1fed ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-83-generic N/A linux-backports-modules-4.4.0-83-generic N/A linux-firmware 1.157.11 RfKill: SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/16/2015 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: F3 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: Z170MX-Gaming 5 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF3:bd10/16/2015:svnGigabyteTechnologyCo.,Ltd.:pnZ170MX-Gaming5:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ170MX-Gaming5:rvrx.x:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: Z170MX-Gaming 5 dmi.product.version: To be filled by O.E.M. dmi.sys.vendor: Gigabyte Technology Co., Ltd. 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