I believe the issue was introduced between Kernel version 3.17.8 (I can't reproduce the issue) and 3.18 (I can reproduce the issue), I'll start digging through the commits and report back on what I find.
-- 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/1455270 Title: Computer is waking from sleep almost immediately after closing the lid Status in linux package in Ubuntu: Incomplete Bug description: I've tested this the new systemd and upstart boot options and I've now been able to reproduce with both. I can't consistently reproduce the issue until it occurs. Once it occurs, it's completely consistent until reboot. I didn't experience this issue in 14.10 or 14.04. Let me know if you need anything else. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: linux-image-3.19.0-16-generic 3.19.0-16.16 ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3 Uname: Linux 3.19.0-16-generic x86_64 ApportVersion: 2.17.2-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: erutherford 2635 F.... pulseaudio /dev/snd/controlC0: erutherford 2635 F.... pulseaudio CurrentDesktop: Unity Date: Thu May 14 18:06:41 2015 HibernationDevice: RESUME=UUID=7359d4c6-4e33-4d49-bd4a-9fb5335f99c7 InstallationDate: Installed on 2015-04-28 (15 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) MachineType: Dell Inc. Dell Precision M3800 ProcEnviron: LANGUAGE=en_US PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-16-generic.efi.signed root=UUID=927f302e-3c7a-46ef-9e23-4cee7662805e ro quiet splash vt.handoff=7 init=/sbin/upstart RelatedPackageVersions: linux-restricted-modules-3.19.0-16-generic N/A linux-backports-modules-3.19.0-16-generic N/A linux-firmware 1.143 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/08/2015 dmi.bios.vendor: Dell Inc. dmi.bios.version: A09 dmi.board.name: Dell Precision M3800 dmi.board.vendor: Dell Inc. dmi.board.version: A09 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: Not Specified dmi.modalias: dmi:bvnDellInc.:bvrA09:bd01/08/2015:svnDellInc.:pnDellPrecisionM3800:pvrA09:rvnDellInc.:rnDellPrecisionM3800:rvrA09:cvnDellInc.:ct8:cvrNotSpecified: dmi.product.name: Dell Precision M3800 dmi.product.version: A09 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1455270/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp