[Notebook W840SU Series] suspend/resume failure

All I know is that I used my laptop on battery power until I got a notification saying that the battery level was critically low and the machine was automatically suspended. After plugging in the power and turning it back on again I got this error message asking me to submit a report.

NB: While the machine was suspended, before pluging in the power line, I removed the secondary harddisk from the laptop. This is probably not related, since the harddrive was not even mounted at the time the machine was suspended. But I mention it just in case.

ProblemType: KernelOops
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-18-generic 3.13.0-18.38
ProcVersionSignature: Ubuntu 3.13.0-18.38-generic 3.13.6
Uname: Linux 3.13.0-18-generic x86_64
Annotation: This occured during a previous suspend and prevented it from resuming properly.
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: trasig 2191 F.... pulseaudio
 /dev/snd/controlC1: trasig 2191 F.... pulseaudio
Date: Sun Mar 23 02:02:15 2014
ExecutablePath: /usr/share/apport/apportcheckresume
Failure: suspend/resume
HibernationDevice: RESUME=UUID=ebcc1b30-489b-44b4-80a9-4aeb74394392
InstallationDate: Installed on 2014-03-21 (1 days ago)
InstallationMedia: Ubuntu-GNOME 14.04 "Trusty Tahr" - Alpha amd64 (20140226)
InterpreterPath: /usr/bin/python3.4
MachineType: Notebook W840SU Series
ProcCmdline: /usr/bin/python3 /usr/share/apport/apportcheckresume
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-18-generic.efi.signed root=UUID=2c1a00f5-0f9b-413d-8830-1c8838f0a02e ro quiet splash vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-18-generic N/A
 linux-backports-modules-3.13.0-18-generic N/A
 linux-firmware 1.126
SourcePackage: linux
Title: [Notebook W840SU Series] suspend/resume failure
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

dmi.bios.date: 11/21/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 4.6.5
dmi.board.asset.tag: Tag 12345
dmi.board.name: W840SU Series
dmi.board.vendor: Notebook
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: Notebook
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd11/21/2013:svnNotebook:pnW840SUSeries:pvrNotApplicable:rvnNotebook:rnW840SUSeries:rvrNotApplicable:cvnNotebook:ct9:cvrN/A:
dmi.product.name: W840SU Series
dmi.product.version: Not Applicable
dmi.sys.vendor: Notebook