Hereby the ouput of journalctl attached in info.txt. Hope It gives you some clues.
** Attachment added: "info.txt" https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1448616/+attachment/4385839/+files/info.txt -- 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/1448616 Title: xubuntu15.04 goes into sleep after power-up Status in systemd package in Ubuntu: Incomplete Bug description: The machine powers up and then goes automatically into sleep. Pressing the power-button again gives the common log-in screen. This appears to be timed, as if you don't succeed to enter your password within a short time, it goes back into sleep again. During booting the screen is blank. Once logged in, everything runs fine, except that the power- down-button doesn't work prperly, the machine goes into sleep. You can only power the machine down by means of sudo shutdown -h now. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: systemd 219-7ubuntu3 ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3 Uname: Linux 3.19.0-15-generic i686 ApportVersion: 2.17.2-0ubuntu1 Architecture: i386 CurrentDesktop: XFCE Date: Sun Apr 26 10:03:11 2015 InstallationDate: Installed on 2014-04-20 (370 days ago) InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release i386 (20140416.2) Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: Dell Inc. Inspiron 6000 PccardctlIdent: Socket 0: no product info available PccardctlStatus: Socket 0: no card ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-15-generic root=UUID=863ca210-f8a1-4d13-9e3a-e173e31bc22d ro quiet splash vt.handoff=7 SourcePackage: systemd UpgradeStatus: Upgraded to vivid on 2015-04-24 (1 days ago) dmi.bios.date: 07/22/2005 dmi.bios.vendor: Dell Inc. dmi.bios.version: A08 dmi.board.name: 0X9238 dmi.board.vendor: Dell Inc. dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA08:bd07/22/2005:svnDellInc.:pnInspiron6000:pvr:rvnDellInc.:rn0X9238:rvr:cvnDellInc.:ct8:cvr: dmi.product.name: Inspiron 6000 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1448616/+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