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My Lenovo x230 tablet laptop fails to suspend about 50% of the time. Here is a /var/log/syslog entry

May 15 07:49:41 mylaptop kernel: [72617.731954] PM: Syncing filesystems ... done.
May 15 07:49:41 mylaptop kernel: [72618.070787] PM: Preparing system for mem sleep
May 15 07:49:41 mylaptop kernel: [72618.071223] Freezing user space processes ... (elapsed 0.002 seconds) done.
May 15 07:49:41 mylaptop kernel: [72618.073487] Freezing remaining freezable tasks ... (elapsed 0.666 seconds) done.
May 15 07:49:41 mylaptop kernel: [72618.740376] PM: Entering mem sleep
May 15 07:49:41 mylaptop kernel: [72618.740507] Suspending console(s) (use no_console_suspend to debug)
May 15 07:49:41 mylaptop kernel: [72618.741023] sd 0:0:0:0: [sda] Synchronizing SCSI cache
May 15 07:49:41 mylaptop kernel: [72618.785464] sd 0:0:0:0: [sda] Stopping disk
May 15 07:49:41 mylaptop kernel: [72619.574364] pci_pm_suspend(): e1000_suspend+0x0/0x20 [e1000e] returns -2
May 15 07:49:41 mylaptop kernel: [72619.574371] dpm_run_callback(): pci_pm_suspend+0x0/0x150 returns -2
May 15 07:49:41 mylaptop kernel: [72619.574376] PM: Device 0000:00:19.0 failed to suspend async: error -2
May 15 07:49:41 mylaptop kernel: [72619.574432] PM: Some devices failed to suspend, or early wake event detected

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: powerd (not installed)
Uname: Linux 3.14.0-031400-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.1
Architecture: amd64
CurrentDesktop: Unity
Date: Thu May 15 07:55:07 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-03-11 (64 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140218)
SourcePackage: powerd
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: linux (Ubuntu)
     Importance: Low
         Status: Incomplete


** Tags: amd64 apport-bug trusty
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suspend fails
https://bugs.launchpad.net/bugs/1319796
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