I was having the same issue after I had to hard reset on system lockup on 3.15.1 mainline.
cat /var/log/pm-suspend.log revealed the following. Running hook /usr/lib/pm-utils/sleep.d/60_wpa_supplicant suspend suspend: Failed to connect to non-global ctrl_ifname: (null) error: No such file or directory /usr/lib/pm-utils/sleep.d/60_wpa_supplicant suspend suspend: success. Running hook /usr/lib/pm-utils/sleep.d/75modules suspend suspend: /usr/lib/pm-utils/sleep.d/75modules suspend suspend: not applicable. Running hook /usr/lib/pm-utils/sleep.d/90clock suspend suspend: /usr/lib/pm-utils/sleep.d/90clock suspend suspend: not applicable. Running hook /usr/lib/pm-utils/sleep.d/94cpufreq suspend suspend: /usr/lib/pm-utils/sleep.d/94cpufreq suspend suspend: success. Running hook /usr/lib/pm-utils/sleep.d/95anacron suspend suspend: stop: Unknown instance: /usr/lib/pm-utils/sleep.d/95anacron suspend suspend: success. Running hook /usr/lib/pm-utils/sleep.d/95hdparm-apm suspend suspend: /usr/lib/pm-utils/sleep.d/95hdparm-apm: 32: .: Can't open /lib/hdparm/hdparm-functions /usr/lib/pm-utils/sleep.d/95hdparm-apm suspend suspend: Returned exit code 2. Fri Jun 27 22:16:29 PDT 2014: Inhibit found, will not perform suspend Fri Jun 27 22:16:29 PDT 2014: Running hooks for resume Running hook /usr/lib/pm-utils/sleep.d/95anacron resume suspend: start: Job failed to start /usr/lib/pm-utils/sleep.d/95anacron resume suspend: success. I reinstalled pmutils, hdparam and anacron and suspend/resume work again. -- 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/1315316 Title: [Lenovo ThinkPad T440s] suspend/resume failing Status in “linux” package in Ubuntu: Incomplete Bug description: Sometimes, the system will appear to go to sleep mode (i.e. the LEDs will start indicating sleep mode). However, it appears to not suspend completely and the system produces a lot of heat while it is in this state which is rather dangerous if you put it in your sleeve and leave it there the system will overheat quickly. The problem exists both with the default Ubuntu and the mainline 3.14 kernel. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 [modified: boot/vmlinuz-3.13.0-24-generic] ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: philipp 1945 F.... pulseaudio /dev/snd/controlC1: philipp 1945 F.... pulseaudio CurrentDesktop: Unity Date: Fri May 2 11:53:25 2014 HibernationDevice: RESUME=UUID=33297c91-85ea-4c06-a780-c68f69e46042 InstallationDate: Installed on 2014-04-30 (1 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) MachineType: LENOVO 20ARS0BH00 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=108e8269-9378-4695-84ff-e001a54e9e97 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/10/2014 dmi.bios.vendor: LENOVO dmi.bios.version: GJET71WW (2.21 ) dmi.board.asset.tag: Not Available dmi.board.name: 20ARS0BH00 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:bvrGJET71WW(2.21):bd02/10/2014:svnLENOVO:pn20ARS0BH00:pvrThinkPadT440s:rvnLENOVO:rn20ARS0BH00:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 20ARS0BH00 dmi.product.version: ThinkPad T440s dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1315316/+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