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[Jan Rathmann <janrathmann@xxxxxxxxxxx>]

Yes, 'pm-powersave false; systemctl suspend; pm-powersave true' seems to
work, and I think I have identified the responsible hook:

/usr/lib/pm-utils/power.d/disable_wol

The bug appears even when all other hooks are there and otherwise has
not occured so far when "disable_wol" is the only hook enabled.

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https://bugs.launchpad.net/bugs/1450396

Title:
  Gigabyte P35-DS3: does not stay suspended

Status in linux package in Ubuntu:
  Confirmed
Status in systemd package in Ubuntu:
  Incomplete

Bug description:
  Hello,

  using Suspend-to-RAM on my system has stopped working reliably on
  Vivid when booting with Systemd. When I try to suspend my PC the
  following happens:

  - PC turns off
  - PC unwantedly wakes up (turns on) by itself again. This time span until it turns on again can reach from a second (almost immediately) until two or three minutes.
  - In a few cases (<25%), the PC stays suspended properly.

  A way to workaround this problem is to boot my PC with Upstart instead
  of Systemd, then this problem never happens (and has never happened in
  any of the previous Ubuntu versions since 2008). Thus it seems to be a
  bug somehow related to Systemd.

  Other steps I have tried to solve the problem (without any success):

  - Checking BIOS settings, all options are set that way that the PC should never wake up by any event other than pressing the power button.
  - Checking by running "cat /proc/acpi/wakeup | grep enabled" if any device could cause wake up events. This lists my USB controller, but deactivating it (with commands like "echo USB0 > /proc/acpi/wakeup") had no success on the problem. Also suspend while running Upstart works fine despite the USB controller listed as "enabled".

  In the system logs I could see no hint what causes the undesired wake-
  ups.

  Allthough there is one factor which seems to have a certain influence:
  If I close programs like Pidgin, Skype or Firefox that cause
  continuous network traffic, the chance is higher that my PC will stay
  suspened (while runinng Systemd).

  Kind regards,
  Jan

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: systemd 219-7ubuntu3
  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
  CurrentDesktop: Unity
  Date: Thu Apr 30 11:24:46 2015
  InstallationDate: Installed on 2015-04-16 (13 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Beta amd64 (20150415)
  MachineType: Gigabyte Technology Co., Ltd. P35-DS3
  ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-3.19.0-15-generic root=/dev/mapper/internal--ssd-root ro rootflags=subvol=@ quiet splash
  SourcePackage: systemd
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/10/2008
  dmi.bios.vendor: Award Software International, Inc.
  dmi.bios.version: F13
  dmi.board.name: P35-DS3
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF13:bd07/10/2008:svnGigabyteTechnologyCo.,Ltd.:pnP35-DS3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnP35-DS3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
  dmi.product.name: P35-DS3
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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