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[nanog <1299567@xxxxxxxxxxxxxxxxxx>]

The bug is caused by a kernel bug that produces ATA errors resulting in
failed suspend when the power is plugged back in prior to suspend.

It is a duplicate of this bug which has expired:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/539467

Relevant section of syslog:

Mar 29 11:01:20 lenovo kernel: [   51.906860] ideapad_laptop: Unknown event: 1
Mar 29 11:01:20 lenovo kernel: [   52.029487] ata2.00: exception Emask 0x10 SAct 0x1 SErr 0x50000 action 0xe frozen
Mar 29 11:01:20 lenovo kernel: [   52.029493] ata2.00: irq_stat 0x00400000, PHY RDY changed
Mar 29 11:01:20 lenovo kernel: [   52.029496] ata2: SError: { PHYRdyChg CommWake }
Mar 29 11:01:20 lenovo kernel: [   52.029499] ata2.00: failed command: READ FPDMA QUEUED
Mar 29 11:01:20 lenovo kernel: [   52.029505] ata2.00: cmd 60/00:00:20:88:00/01:00:0f:00:00/40 tag 0 ncq 131072 in
Mar 29 11:01:20 lenovo kernel: [   52.029505]          res 50/00:03:00:00:00/00:00:00:00:00/a0 Emask 0x10 (ATA bus error)
Mar 29 11:01:20 lenovo kernel: [   52.029507] ata2.00: status: { DRDY }

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https://bugs.launchpad.net/bugs/1299567

Title:
  [LENOVO 20270] [regression] suspend/resume failure

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Upgraded to Ubuntu 14.04beta2 and susped failed on first attempt.
  Suspend functioned flawlessly in Ubuntu 13.10.

  ProblemType: KernelOops
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-20-generic 3.13.0-20.42
  ProcVersionSignature: Ubuntu 3.13.0-20.42-generic 3.13.7
  Uname: Linux 3.13.0-20-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:  kathy      1754 F.... pulseaudio
   /dev/snd/controlC1:  kathy      1754 F.... pulseaudio
  Date: Sat Mar 29 12:47:50 2014
  ExecutablePath: /usr/share/apport/apportcheckresume
  Failure: suspend/resume
  HibernationDevice: RESUME=UUID=091196c9-ea53-4d0b-adef-ba5328cd2d63
  InstallationDate: Installed on 2013-12-29 (89 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  InterpreterPath: /usr/bin/python3.4
  MachineType: LENOVO 20270
  ProcCmdline: /usr/bin/python3 /usr/share/apport/apportcheckresume
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-20-generic.efi.signed root=UUID=14cc5254-69cd-49bd-99a2-0d71d8a2d26e ro quiet splash
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-20-generic N/A
   linux-backports-modules-3.13.0-20-generic  N/A
   linux-firmware                             1.126
  SourcePackage: linux
  Title: [LENOVO 20270] suspend/resume failure
  UpgradeStatus: Upgraded to trusty on 2014-03-29 (0 days ago)
  UserGroups:
   
  dmi.bios.date: 09/04/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 7CCN32WW
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: Cherry 4A Touch
  dmi.board.vendor: LENOVO
  dmi.board.version: 31900058STD
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: IdeaPad U430 Touch
  dmi.modalias: dmi:bvnLENOVO:bvr7CCN32WW:bd09/04/2013:svnLENOVO:pn20270:pvrIdeaPadU430Touch:rvnLENOVO:rnCherry4ATouch:rvr31900058STD:cvnLENOVO:ct10:cvrIdeaPadU430Touch:
  dmi.product.name: 20270
  dmi.product.version: IdeaPad U430 Touch
  dmi.sys.vendor: LENOVO

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