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[Mark Pointing <1495043@xxxxxxxxxxxxxxxxxx>]

Tested latest v3.19 mainline kernel and it appears to be working.

** Tags added: kernel-fixed-upstream

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https://bugs.launchpad.net/bugs/1495043

Title:
  Suspend/Resume Regression 3.19.0-28-generic Dell xps15

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Suspend resume was working on 3.19.0-26 but 3.19.0-28 appears to
  suspend, but no longer resumes.  Relevant portion of dmesg info using
  pm-trace is as follows:

  [    1.168740] registered taskstats version 1
  [    1.170526] Key type trusted registered
  [    1.174836] Key type encrypted registered
  [    1.174843] AppArmor: AppArmor sha1 policy hashing enabled
  [    1.176721] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input3
  [    1.398911] evm: HMAC attrs: 0x1
  [    1.399640]   Magic number: 0:469:661
  [    1.399643]   hash matches /build/linux-5xFjum/linux-3.19.0/drivers/base/power/main.c:642
  [    1.399655]   hash matches /build/linux-5xFjum/linux-3.19.0/drivers/base/power/main.c:738
  [    1.399670] block ram14: hash matches
  [    1.399692] platform PNP0C0A:00: hash matches
  [    1.399711] battery PNP0C0A:00: hash matches
  [    1.399793] rtc_cmos 00:01: setting system clock to 1976-02-02 02:39:41 UTC (192076781)
  [    1.399886] BIOS EDD facility v0.16 2004-Jun-25, 0 devices found
  [    1.399887] EDD information not available.
  [    1.399970] PM: Hibernation image not present or could not be loaded.
  [    1.400304] Freeing unused kernel memory: 1408K (ffffffff81d36000 - ffffffff81e96000)
  [    1.400305] Write protecting the kernel read-only data: 12288k

  To reproduce the bug:
  1) Boot into Ubuntu Gnome with kernel 3.19.0.28-generic
  2) Log in to desktop.
  3) Close laptop lid
  4) Wait about 10 seconds (doesn't seem to be critical how long you wait)
  5) Open laptop lid.

  What happens:
  The keyboard backlight and the power button light come on, but the screen remains blank.  Using Ctr-Alt-F1 does nothing (can't get to a virtual console, indicating that it's not just X that has stopped)

  What I expect to happen:
  On opening of the laptop lid, I expect the lockscreen to show.

  Other info:
  This laptop has nvidia graphics disabled using nvidia-prime

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-28-generic 3.19.0-28.30
  ProcVersionSignature: Ubuntu 3.19.0-28.30-generic 3.19.8-ckt5
  Uname: Linux 3.19.0-28-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.17.2-0ubuntu1.4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  mark       1566 F.... pulseaudio
   /dev/snd/controlC0:  mark       1566 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Sat Sep 12 19:26:03 2015
  HibernationDevice: RESUME=UUID=ff91bc8d-f7ef-4650-81e0-608068f4f8cb
  InstallationDate: Installed on 2015-08-31 (12 days ago)
  InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: Dell Inc. XPS 15 9530
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-28-generic.efi.signed root=UUID=b69e369b-42c8-4f85-8a2c-dcfec06b7d88 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-28-generic N/A
   linux-backports-modules-3.19.0-28-generic  N/A
   linux-firmware                             1.143.3
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/30/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A09
  dmi.board.name: XPS 15 9530
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A09
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: Not Specified
  dmi.modalias: dmi:bvnDellInc.:bvrA09:bd07/30/2015:svnDellInc.:pnXPS159530:pvrA09:rvnDellInc.:rnXPS159530:rvrA09:cvnDellInc.:ct8:cvrNotSpecified:
  dmi.product.name: XPS 15 9530
  dmi.product.version: A09
  dmi.sys.vendor: Dell Inc.

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