I can confirm this bug. I just upgraded my home server from 12.04.5 LTS to 14.04.1 LTS and now the system always reboots after a poweroff / shutdown -h command. The only way to shut the system off is to press the power button when it's in the POST phase.
If I issue a "poweroff" command the server shuts down and then instantly reboots. I tried to set acpi=force in /etc/default/grub but this did not help. With 12.04 I had no problem with poweroff and I used to use Wake On LAN to boot up my server whenever a client needs it. Fortunately I had cloned my old system disk before the upgrade so I was able to revert to 12.04 without a fuss. As expected the problem is not there with the 12.04 disk. Thus it is not the hardware or BIOS which causes the problem but definetely something in 14.04. Was there possibly some major change in 14.04 with respect to ACPI behaviour? Ubuntu 14.04 is at its server release .1 but with not being able to put my home server to sleep it proves to be totally useless to me. P.S. My Mobo is an MSI P9D-X with a Xeon CPU E3-1230L v3 -- 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/1346269 Title: Ubuntu 14.04 won't shut down (reboots) Status in “linux” package in Ubuntu: Confirmed Bug description: I just installed a new 14.04 server install on the following hardware: ASRock E3C224-4L Server/Workstation Board (Intel C224 chipset) Intel Xeon E3-1245V3 Quad Core LGA1150 CPU 32GB of DDR3 ECC RAM LSI 9201-16i SAS/SATA HBA I am unable to power down the system without physically doing it with the button, or powering it off using the inbuild IPMI management. All of the following result in a reboot: sudo shutdown -h now sudo shutdown -p now sudo shutdown -P now sudo halt now sudo halt -fihp now sudo init 0 I have tried acpi=force, acpi=off, acpi=noirq, noapic I tried the script from http://askubuntu.com/questions/13288...-of-a-shutdown as follows: #!/bin/bash case "$1" in stop) for i in /sys/bus/*/devices/*/power/control ; do echo on > $i ; done ;; esac exit 0 That didn't help. I also set WOL off on the NIC that was plugged in (only one of the 4 onboard NICs is connected at present, for testing) with sudo ethtool -s eth0 wol d and it didn't help, I've looked in the BIOS, and can't find a WOL section in there. To try to eliminate WOL, I also tried with neither the NIC in use for testing, nor the dedicated IPMI NIC connected, and it didn't help. I've updated my BIOS to the latest version. I've probably tried more that I've forgotten to list here - I've exhausted my options! I'm at a loose end now - no idea what to do next to further troubleshoot it, has anyone else had any similar problems on C224, or does anyone know what logs I should be inspecting, or how I can generate further debug logs? ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-32-generic 3.13.0-32.57 ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4 Uname: Linux 3.13.0-32-generic x86_64 NonfreeKernelModules: zfs zunicode zavl zcommon znvpair AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Jul 19 20:34 seq crw-rw---- 1 root audio 116, 33 Jul 19 20:34 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.14.1-0ubuntu3.2 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CRDA: Error: [Errno 2] No such file or directory: 'iw' Date: Mon Jul 21 13:55:56 2014 InstallationDate: Installed on 2014-07-13 (7 days ago) InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2) MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M. PciMultimedia: ProcEnviron: LANGUAGE=en_GB:en TERM=screen PATH=(custom, no user) LANG=en_GB.UTF-8 SHELL=/bin/bash ProcFB: 0 astdrmfb ProcKernelCmdLine: BOOT_IMAGE=/root/boot/vmlinuz-3.13.0-32-generic root=UUID=cebd6063-3e82-41e4-a8ac-22fa6a7d11a7 ro rootflags=subvol=root nomdmonddf nomdmonisw rootflags=degraded nomdmonddf nomdmonisw RelatedPackageVersions: linux-restricted-modules-3.13.0-32-generic N/A linux-backports-modules-3.13.0-32-generic N/A linux-firmware 1.127.4 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) WifiSyslog: dmi.bios.date: 05/07/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P2.10 dmi.board.name: E3C224-4L dmi.board.vendor: ASRock 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.:bvrP2.10:bd05/07/2014:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnE3C224-4L:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. 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