My Dell workstation is a fresh install of 15.04, also. I'm having the same problem. I've attached some screen shots that show the last messages typically seen after I try REISUB.
** Attachment added: "IMG_0765.JPG" https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1464917/+attachment/4537644/+files/IMG_0765.JPG -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1464917 Title: reboot hangs at 'Reached target Shutdown' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1464917/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs