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[Michael Stucki <mundaun@xxxxxx>]

I have a Lenovo Carbon X1 4th Gen which is most of the time connected to
a OneLink+ dock. I encounter the same problem with kernel 4.4.0-22:
Resume sometimes works, but sometimes not.

I have tested a few of the recent kernels available on
https://kernel.ubuntu.com/~kernel-ppa/mainline/ and here are my results:

Not booting with Ubuntu 16.04 on Lenovo Carbon X1 4th Gen:
- drm-intel-next/2016-06-02-yakkety/linux-image-4.6.0-997-generic_4.6.0-997.201606012202_amd64.deb
- drm-next/2016-06-03-yakkety/linux-image-4.7.0-996-generic_4.7.0-996.201606022202_amd64.deb

Boots but fails to resume on 1st try:
- drm-next/2016-05-09-wily/linux-image-4.6.0-996-generic_4.6.0-996.201605082201_amd64.deb

Resumes fine:
- drm-intel-nightly/2016-06-05-yakkety/linux-image-4.7.0-994-generic_4.7.0-994.201606042201_amd64.deb
- daily/2016-06-05-yakkety/linux-image-4.7.0-999-generic_4.7.0-999.201606042201_amd64.deb

In both cases I've made a few resumes and also plugged the dock on and
off several times without any issues so far.

Currently I'm running the latest daily kernel and it seems to work good.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1566302

Title:
  Ubuntu 16.04: Suspend freezes the system after upgrade to linux image
  4.4.0-16

Status in linux package in Ubuntu:
  Won't Fix

Bug description:
  I'm using ubuntu 16.04 on a XPS 15 9550.

  Suspend/resume worked flawlessly with linux image 4.4.0-15, and after
  standard upgrade yesterday (5/04/2016) which installed image 4.4.0-16,
  the system freezes when attempting a suspend. I get  no response from
  the system (nor keyboard, nor screen, nor touchpad), but it gets very
  hot, so that it must be running something.

  Booting with 4.4.0-15 makes the suspend to work perfectly.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-extra-4.4.0-16-generic 4.4.0-16.32
  ProcVersionSignature: Ubuntu 4.4.0-15.31-generic 4.4.6
  Uname: Linux 4.4.0-15-generic x86_64
  ApportVersion: 2.20.1-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  macias     1770 F.... pulseaudio
  CurrentDesktop: X-Cinnamon
  Date: Tue Apr  5 14:56:17 2016
  HibernationDevice: RESUME=UUID=4180adfa-3852-4a96-86b4-f3696448c743
  InstallationDate: Installed on 2016-03-07 (28 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160304)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 04f3:21d5 Elan Microelectronics Corp. 
   Bus 001 Device 002: ID 0a5c:6410 Broadcom Corp. 
   Bus 001 Device 004: ID 1bcf:2b95 Sunplus Innovation Technology Inc. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Dell Inc. XPS 15 9550
  ProcEnviron:
   LANGUAGE=es_ES
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=es_ES.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-15-generic.efi.signed root=UUID=673f4658-75f8-4c01-bcd8-0af860269699 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-15-generic N/A
   linux-backports-modules-4.4.0-15-generic  N/A
   linux-firmware                            1.157
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/25/2016
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 01.01.19
  dmi.board.name: 0N7TVV
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvr01.01.19:bd01/25/2016:svnDellInc.:pnXPS159550:pvr:rvnDellInc.:rn0N7TVV:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: XPS 15 9550
  dmi.sys.vendor: Dell Inc.

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