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[Christopher Barrington-Leigh <cpblpublic@xxxxxxxxx>]

I had this problem a lot on a Lenovo X230Table under 14.04 (and maybe the previous distro) but the latest firmware update (BIOS update) from Lenovo seems to have fixed it.
I have not yet tried upgrading to 14.10.

(Incidentally, if I'm allowed to say so here, my machine still fails to
shut down sometimes: that is, it reboots instead of shutting down, even
with the latest BIOS. This can be very bad due to the risk of
overheating if it's being put away...)

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https://bugs.launchpad.net/bugs/1324028

Title:
  [Lenovo ThinkPad X230] e1000e driver intermittently prevents suspend
  in 3.15.0-2-generic

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  utopic has been intermittently failing to suspend for me.  It works
  after a fresh boot, and then mysteriously stops working.

  'echo mem > /sys/power/state' was returning ENOENT on the write
  syscall.

  dmesg shows the following:
  [38986.394761] [drm] Enabling RC6 states: RC6 on, RC6p on, RC6pp off
  [38992.721434] e1000e 0000:00:19.0 eth1: PHY Wakeup cause - Broadcast Packet
  [38993.530046] e1000e 0000:00:19.0 eth1: Hardware Error
  [38993.841433] pci_pm_runtime_suspend(): e1000e_pm_runtime_suspend+0x0/0xc0 [e1000e] returns -16

  WORKAROUND: After executing the following, suspend works again:
  modprobe -r e1000e

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.15.0-2-generic 3.15.0-2.6
  ProcVersionSignature: Ubuntu 3.15.0-2.6-generic 3.15.0-rc6
  Uname: Linux 3.15.0-2-generic x86_64
  ApportVersion: 2.14.2-0ubuntu4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  vorlon     3956 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed May 28 11:11:53 2014
  HibernationDevice: RESUME=UUID=6df76279-19ea-45a4-bec9-e4fdc858729a
  InstallationDate: Installed on 2010-09-24 (1342 days ago)
  InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
  MachineType: LENOVO 2306CTO
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.15.0-2-generic root=/dev/mapper/hostname-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.15.0-2-generic N/A
   linux-backports-modules-3.15.0-2-generic  N/A
   linux-firmware                            1.129
  SourcePackage: linux
  UpgradeStatus: Upgraded to utopic on 2014-05-23 (5 days ago)
  WifiSyslog:

  dmi.bios.date: 10/25/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G2ET97WW (2.57 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2306CTO
  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:bvrG2ET97WW(2.57):bd10/25/2013:svnLENOVO:pn2306CTO:pvrThinkPadX230:rvnLENOVO:rn2306CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2306CTO
  dmi.product.version: ThinkPad X230
  dmi.sys.vendor: LENOVO

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