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[Dan Poler <dan.poler@xxxxxxxxxxxxx>]

Issue resolved. The magic seems to be:

Disable Rapid Start
Disable Smart Connect
Disable TPM

Rapid Start was already disabled on my machine so it's one of Smart
Connect or TPM that did it. With all three of those disabled, the system
does not resume after 24 hours.

I'd still argue this is a bug, though, as all of these should function
under Ubuntu, no?

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https://bugs.launchpad.net/bugs/1318477

Title:
  [Dell XPS 15 9530] Wakes from sleep after exactly 24 hours + 3-5
  seconds

Status in Dell Sputnik:
  New
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Symptoms: The system will wake itself from sleep after very nearly exactly 24 hours, + / - 10 seconds or so. /var/log/pm-suspend.log will show this:
  Sat May 10 22:08:49 MDT 2014: performing suspend
  Sun May 11 22:08:54 MDT 2014: Awake.

  In this case the system has resumed after 24 hours and 5 seconds with
  no user request to do so. Steps to reproduce: Suspend machine by
  closing lid. The system can be plugged in to charge while it is
  suspended, and then subsequently unplugged, but the suspend occurs on
  battery power, and when the resume occurs the system is also not
  plugged in. I have not tested other permutations. No other action is
  necessary. The system will randomly resume 24 hours + 3-5 seconds
  later.

  ---
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  dpoler     2444 F.... pulseaudio
   /dev/snd/pcmC1D0p:   dpoler     2444 F...m pulseaudio
   /dev/snd/controlC0:  dpoler     2444 F.... pulseaudio
  CurrentDesktop: Unity
  CurrentDmesg:
   Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied
   dmesg: write failed: Broken pipe
  DistroRelease: Ubuntu 14.04
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-05-06 (6 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: Dell Inc. XPS 15 9530
  NonfreeKernelModules: nvidia
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=02812295-4462-4c5a-9e17-32d49164caf2 ro acpi=force quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
  Tags:  trusty
  Uname: Linux 3.13.0-24-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: bumblebee libvirtd sudo
  WifiSyslog:

  _MarkForUpload: True
  dmi.bios.date: 09/17/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A00
  dmi.board.name: XPS 15 9530
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: Not Specified
  dmi.modalias: dmi:bvnDellInc.:bvrA00:bd09/17/2013:svnDellInc.:pnXPS159530:pvrA00:rvnDellInc.:rnXPS159530:rvrA00:cvnDellInc.:ct8:cvrNotSpecified:
  dmi.product.name: XPS 15 9530
  dmi.product.version: A00
  dmi.sys.vendor: Dell Inc.

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