Your system isn't too happy because of bug 1452644. This is fixed in vivid-proposed, but this hasn't made it into -updates yet. This causes network mounts etc. to fail. That might be related to the shutdown problems. To get this out of the way, could you install the -proposed setserial and re-test?
Secondly, I suppose you actually used "reboot" (or the corresponding indicator action), and not "halt"? Can you please run "sudo systemctl start debug-shell", then shut down/reboot, and when it hangs do Ctrl+Alt+F9 look at "systemctl list- jobs" (hanging jobs), or "dmesg" if you see any hanging jobs/errors there? Do you get some meaningful errors at the end of "journalctl"? You could try booting without "quiet splash" and with "debug" instead to increase verbosity what's going on, shut down, and capture what's being logged? ** Changed in: systemd (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1464917 Title: reboot hangs at 'Reached target Shutdown' Status in systemd package in Ubuntu: Incomplete Bug description: I rebooted my 15.04 system, and found it hanging indefinitely at the plymouth shutdown screen. Hitting esc to reveal the console showed a normal set of shutdown messages, ending with 'Reached target Shutdown' (paraphrased from memory). The system never rebooted on its own. I had to use SysRq to finish the shutdown. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: systemd 219-7ubuntu6 ProcVersionSignature: Ubuntu 3.19.0-20.20-generic 3.19.8 Uname: Linux 3.19.0-20-generic x86_64 ApportVersion: 2.17.2-0ubuntu1.1 Architecture: amd64 CurrentDesktop: Unity Date: Sat Jun 13 11:53:10 2015 InstallationDate: Installed on 2010-09-24 (1723 days ago) InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1) MachineType: LENOVO 2306CTO ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-20-generic root=/dev/mapper/hostname-root ro quiet splash vt.handoff=7 SourcePackage: systemd UpgradeStatus: Upgraded to vivid on 2014-12-06 (189 days ago) dmi.bios.date: 10/25/2013 dmi.bios.vendor: LENOVO dmi.bios.version: G2ET97WW (2.57 ) dmi.board.asset.tag: Not Available dmi.board.name: 2306CTO dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrG2ET97WW(2.57):bd10/25/2013:svnLENOVO:pn2306CTO:pvrThinkPadX230:rvnLENOVO:rn2306CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 2306CTO dmi.product.version: ThinkPad X230 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1464917/+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