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[Boris Gjenero <boris.gjenero@xxxxxxxxx>]

I can reproduce this with v4.1-rc1-vivid. I had to uninstall
nvidia-340-updates because the DKMS module failed to build and boot hung
while it was installed. So, I was using nouveau for my GeForce 8600GT
PCI express graphics card.

I can't reproduce it if not running X, or running X, twm and xterm or
GNOME terminal. However, if I run Google Chrome in addition to that, I
can reproduce it. Also, I can always reproduce it when using Openbox or
Cinnamon.

Successful sleep in Linux (without an unexpected wakeup) does not
prevent future wakeups when conditions change.

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https://bugs.launchpad.net/bugs/1450088

Title:
  Wakes from S3 in a few seconds unless WIndows has been run

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I'm running 64-bit Ubuntu 15.04 on a Gigabyte GA-P35-DS3R rev 1.0
  motherboard with BIOS F13. I also have 32-bit Windows 7 SP1. If power
  was fully cut, including standby power, and Windows has not been run
  since then, Ubuntu will quickly wake from S3 sleep without any
  apparent reason.  Procedure to reproduce:

  1. Shut down computer normally from the operating system.
  2. When computer appears off, cut power either via the switch on the back or by unplugging it.
  3. Wait some time. 10 seconds is probably enough and a minute should be 100% certain.
  4. Boot directly into Ubuntu. It's okay to boot into Ubuntu via the Windows 7 boot menu. Do not actually boot into Windows itself though; if you do that you must restart at step 1.
  5. Initiate S3 sleep. I have tried both of these with the same results:
  dbus-send --print-reply --system --dest=org.freedesktop.login1 /org/freedesktop/login1 org.freedesktop.login1.Manager.Suspend boolean:true
  sudo sh -c "echo mem > /sys/power/state"
  6. Wait. The system should wake up within a few seconds, and certainly in less than a minute. The delay varies.

  The only problem is that the system won't stay sleeping. Everything
  works fine after the system wakes. Repeated attempts to sleep give the
  same result.

  I have disabled everything in /proc/acpi/wakeup using the following in /etc/rc.local:
  sed -n '/enabled/s,\([^\t]\+\)\s.*$,echo \1 > /proc/acpi/wakeup,p' /proc/acpi/wakeup | sh
  I confirm that it appears disabled before and after sleep.

  I have also disabled all wakeup files in sys (found via sudo find /sys
  -iname wakeup -type f), and it didn't help.

  The logs don't seem to show a wakeup reason.

  If I boot into Windows 7 and then boot into Linux, this problem stops
  happening. Shutting down from either operating system or pressing the
  reset button does not cause the problem to reoccur. It only reoccurs
  if standby power has been cut. I am assuming that Linux fails to
  perform some initialization which Windows performs, and that
  initialization persists as long as standby power is available. I am
  assuming this is a kernel bug because it occurs even if I use "echo
  mem > /sys/power/state" to enter sleep.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-15-generic 3.19.0-15.15
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  Uname: Linux 3.19.0-15-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  bgjenero   2280 F.... pulseaudio
  CurrentDesktop: X-Cinnamon
  Date: Wed Apr 29 10:39:49 2015
  HibernationDevice: RESUME=UUID=a44c3385-e1ba-4456-91ec-be27c892ff11
  InstallationDate: Installed on 2012-01-19 (1196 days ago)
  InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: Gigabyte Technology Co., Ltd. P35-DS3R
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-15-generic root=UUID=e59328d8-57ee-4106-aa49-41ceffea8161 ro
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-15-generic N/A
   linux-backports-modules-3.19.0-15-generic  N/A
   linux-firmware                             1.143
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  SourcePackage: linux
  UpgradeStatus: Upgraded to vivid on 2015-04-24 (5 days ago)
  dmi.bios.date: 06/19/2009
  dmi.bios.vendor: Award Software International, Inc.
  dmi.bios.version: F13
  dmi.board.name: P35-DS3R
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF13:bd06/19/2009:svnGigabyteTechnologyCo.,Ltd.:pnP35-DS3R:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnP35-DS3R:rvr:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
  dmi.product.name: P35-DS3R
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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