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[Jan Rathmann <janrathmann@xxxxxxxxxxx>]

Martin, I did check that and I think I can preliminary give results that
are quite interesting:

- If I run the ethtool  command before 'systemctl suspend', the bug
hasn't appeared so far - and it does not seem to matter if I run ethtool
with the 'wol g' (enable WOL) or with the 'wol d' flag!

- After I suspended my PC succesfull by running e.g. 'ethtool -s eth0
wol g ; systemctl suspend', the bug seems to stay away untill the next
reboot even I simply use 'systemctl suspend' without ethtool on the next
attempts to suspend.

Thus it seems that for proper suspend on my system it only matters that
ethtool is "poking" the network card one-time after system startup,
regardless if I use it to enable or disable WOL. I'll do further testing
if it is indeed sufficient to put the ethtool command e.g. in
/etc/rc.local to make the bug disappear without any additional steps.

(Allthough it has no influence on the bug there is one relevant
difference between running  ethtool to disable or enable WOL before
systemctl: If I disable WOL, my network is offline after resume, and I
have do run 'ifdown eth0; ifup eth0' to make it work again. If I enable
WOL instead, my network is up after suspend at least most of the time.)

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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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