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[Stephen <scbash@xxxxxxxxx>]

Here are the results of the reverse bisect:

 $ git bisect start
 $ git bisect bad v4.4-rc6
 $ git bisect good v4.2.6
Bisecting: a merge base must be tested
[64291f7db5bd8150a74ad2036f1037e6a0428df2] Linux 4.2
 $ cp /boot/config-4.2.0-22-generic .config
 $ make oldconfig
 $ make clean
 $ time make -j5 deb-pkg LOCALVERSION=-custom-1
 $ cd ..
 $ ls
 $ sudo dpkg -i linux-image-4.2.0-custom-1_4.2.0-custom-1-2_amd64.deb linux-headers-4.2.0-custom-1_4.2.0-custom-1-2_amd64.deb 
 $ sudo reboot
 $ git bisect bad
The merge base 64291f7db5bd8150a74ad2036f1037e6a0428df2 is bad.
This means the bug has been fixed between 64291f7db5bd8150a74ad2036f1037e6a0428df2 and [1c02865136fee1d10d434dc9e3616c8e39905e9b].

Looks like I need to do a forward bisect from 4.2 to 4.2.6 to determine
when the bug was introduced?

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https://bugs.launchpad.net/bugs/1529266

Title:
  [HP Spectre x360 - 13-4005dx] suspend/resume failure

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Upgrading from 15.04 to 15.10 my Spectre x360 is no longer able to
  suspend (either shutting the lid or sudo pm-suspend in a terminal).
  This is (AFAIK) the same problem as #1502531.

  Following the instructions in #1502531 I updated to mainline kernel
  v4.4-rc6-wily and had no problems suspending the machine.

  At the request of Chris Penalver I did the following:
   1. rebooted to the Ubuntu 4.2.0-22-generic kernel (since I've been running 4.4)
   2. ran sudo pm-suspend, system locked up (frozen mouse, caps lock key didn't light up when pressed)
   3. held the power button to shut laptop off
   4. booted into the 4.2.0-22-generic kernel again
   5. ran ubuntu-bug linux to generate this bug report

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-22-generic 4.2.0-22.27
  ProcVersionSignature: Ubuntu 4.2.0-22.27-generic 4.2.6
  Uname: Linux 4.2.0-22-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  scbash     1551 F.... pulseaudio
  CurrentDesktop: GNOME-Classic:GNOME
  Date: Fri Dec 25 11:29:40 2015
  HibernationDevice: RESUME=UUID=ab9ec8da-59c5-439b-b82d-c2f9eed12b3c
  InstallationDate: Installed on 2015-05-22 (217 days ago)
  InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: Hewlett-Packard HP Spectre x360 Convertible 13
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-22-generic.efi.signed root=UUID=a70d7c75-082c-4180-9512-a509e815ff74 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-22-generic N/A
   linux-backports-modules-4.2.0-22-generic  N/A
   linux-firmware                            1.149.3
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: Upgraded to wily on 2015-11-12 (43 days ago)
  dmi.bios.date: 10/20/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F.2C
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 802D
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: 58.41
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF.2C:bd10/20/2015:svnHewlett-Packard:pnHPSpectrex360Convertible13:pvr:rvnHewlett-Packard:rn802D:rvr58.41:cvnHewlett-Packard:ct10:cvrChassisVersion:
  dmi.product.name: HP Spectre x360 Convertible 13
  dmi.sys.vendor: Hewlett-Packard

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