Looks like today's ubuntu updates fixed the bug, which is strange. The /var/log/apt/history.log entry produced by the update is:
Start-Date: 2015-02-03 22:51:31 Commandline: aptdaemon role='role-commit-packages' sender=':1.136' Install: linux-image-extra-3.13.0-45-generic:amd64 (3.13.0-45.74), linux-image-3.13.0-45-generic:amd64 (3.13.0-45.74), linux-headers-3.13.0-45-generic:amd64 (3.13.0-45.74), linux-headers-3.13.0-45:amd64 (3.13.0-45.74) Upgrade: linux-headers-generic:amd64 (3.13.0.44.51, 3.13.0.45.52), python3-software-properties:amd64 (0.92.37.2, 0.92.37.3), unzip:amd64 (6.0-9ubuntu1.1, 6.0-9ubuntu1.2), software-properties-common:amd64 (0.92.37.2, 0.92.37.3), linux-libc-dev:amd64 (3.13.0-44.73, 3.13.0-45.74), software-properties-gtk:amd64 (0.92.37.2, 0.92.37.3), linux-image-generic:amd64 (3.13.0.44.51, 3.13.0.45.52), linux-generic:amd64 (3.13.0.44.51, 3.13.0.45.52) End-Date: 2015-02-03 22:53:23 At first glance, I thought that the 3.13.0-45 kernel version fixed it. But then I rebooted into kernel version 3.13.0-44, and couldn't reproduce the original bug, neither. What caused the bug and what solved it? ** Changed in: linux (Ubuntu) Status: Confirmed => Invalid ** Changed in: upstart (Ubuntu) Status: New => Incomplete ** Changed in: upstart (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to upstart in Ubuntu. https://bugs.launchpad.net/bugs/1414494 Title: reboot after shutdown Gigabyte GA-P41T-D3 motherboard, Intel G41 Express chipset Status in linux package in Ubuntu: Invalid Status in upstart package in Ubuntu: Invalid Bug description: This bug is pretty similar to the one described in #1409279: shutdown from GUI results in shutdown, some seconds of silence, then reboot. Hardware shutdown (holding power button for 4 secs) works OK. Last kernel update happened on 2015.01.10, but I just started noticing this bug today (2015.01.25), so it may not be a kernel issue. WORKAROUND: shutdown -H ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-44-generic 3.13.0-44.73 ProcVersionSignature: Ubuntu 3.13.0-44.73-generic 3.13.11-ckt12 Uname: Linux 3.13.0-44-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.14.1-0ubuntu3.6 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: corphicks 1877 F.... pulseaudio /dev/snd/controlC0: corphicks 1877 F.... pulseaudio /dev/snd/controlC1: corphicks 1877 F.... pulseaudio CurrentDesktop: XFCE Date: Sun Jan 25 22:20:00 2015 HibernationDevice: RESUME=UUID=cf5c04c0-7bdb-41f5-b91c-6c9bb0fdaf90 InstallationDate: Installed on 2014-04-30 (270 days ago) InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2) IwConfig: eth0 no wireless extensions. lo no wireless extensions. MachineType: Gigabyte Technology Co., Ltd. P41T-D3 ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-44-generic root=UUID=2e1f47f8-1d20-48a6-9354-5ba871c8bfc8 ro quiet splash RelatedPackageVersions: linux-restricted-modules-3.13.0-44-generic N/A linux-backports-modules-3.13.0-44-generic N/A linux-firmware 1.127.11 RfKill: SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/31/2010 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F1 dmi.board.name: P41T-D3 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF1:bd05/31/2010:svnGigabyteTechnologyCo.,Ltd.:pnP41T-D3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnP41T-D3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: P41T-D3 dmi.sys.vendor: Gigabyte Technology Co., Ltd. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1414494/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp