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[Amos Blanton <amos@xxxxxxxxxxxxxxx>]

I switched to Arch, where the problem persists. The rc.local fix
described above does not work because Arch uses systemd. Here is a UDEV
rule that solves the problem.

# cat /etc/udev/rules.d/ehc1.rules
ACTION=="add", KERNEL=="0000:00:1d.0", SUBSYSTEM=="pci", RUN+="/bin/sh -c 'echo EHC1 > /proc/acpi/wakeup'"

From:
https://bbs.archlinux.org/viewtopic.php?pid=1393073#p1393073

Apparently, even macs are having this problem, the root of which is the
EHC1 USB device controller wakeing the computer - sometimes randomly.
This bug is rather bad because it can cause the laptop to wake while
inside an enclosed insulated space, like a backpack, which makes things
get very hot in there.

I have little hope that the latest Thinkpad Bios will resolve this
problem, but will try to test in the coming weeks.

-- 
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/1309938

Title:
  [Thinkpad Twist] resumes immediately after suspend

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Thinkpad S230U resumes immediately after suspend. Can test with: sudo
  pm-suspend.

  WORKAROUND: Add the following to: /etc/rc.local
  if grep -q "EHC1.*enabled" /proc/acpi/wakeup; then
   echo EHC1 > /proc/acpi/wakeup
  fi

  ---
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  lightnin   1939 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=a1da2744-b701-4c18-848e-cdb59b9162e0
  InstallationDate: Installed on 2014-04-17 (3 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Daily amd64 (20140413)
  MachineType: LENOVO 33472HU
  NonfreeKernelModules: wl
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=8f55f4e9-c3be-461f-94b6-c6312cba3345 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  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
  Tags:  trusty
  Uname: Linux 3.13.0-24-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 10/25/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GDETA3WW (1.63 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 33472HU
  dmi.board.vendor: LENOVO
  dmi.board.version: Win8 Pro DPK TPG
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrGDETA3WW(1.63):bd10/25/2013:svnLENOVO:pn33472HU:pvrThinkPadTwist:rvnLENOVO:rn33472HU:rvrWin8ProDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 33472HU
  dmi.product.version: ThinkPad Twist
  dmi.sys.vendor: LENOVO

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