Public bug reported:

I have a Lenovo Thinkpad X250 and the ThinkPad Ultra Dock docking
station which is connected to two Lenovo monitors via DisplayPort.
Docking works fine but if I remove the computer from the dock and try to
suspend, the computer locks up (screen freezes no keyboard commands
work) and I have to hard reboot. The computer works fine after removing
from the dock except for this suspend issue.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-43-generic 4.4.0-43.63
ProcVersionSignature: Ubuntu 4.4.0-43.63-generic 4.4.21
Uname: Linux 4.4.0-43-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
 /dev/snd/controlC1:  moorepants   2278 F.... pulseaudio
 /dev/snd/controlC0:  moorepants   2278 F.... pulseaudio
CurrentDesktop: Unity
Date: Mon Oct 17 18:46:24 2016
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=00333301-992b-4a3e-a93f-f6ace66eec1d
InstallationDate: Installed on 2015-11-14 (339 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: LENOVO 20CMCTO1WW
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-43-generic 
root=UUID=180cbbee-84f0-4f5d-8f67-ab39fe37099a ro quiet splash vt.handoff=7
 linux-restricted-modules-4.4.0-43-generic N/A
 linux-backports-modules-4.4.0-43-generic  N/A
 linux-firmware                            1.157.4
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2016-04-22 (178 days ago) 06/19/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: N10ET36W (1.15 )
dmi.board.asset.tag: Not Available 20CMCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40709 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi:bvnLENOVO:bvrN10ET36W(1.15):bd06/19/2015:svnLENOVO:pn20CMCTO1WW:pvrThinkPadX250:rvnLENOVO:rn20CMCTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone: 20CMCTO1WW
dmi.product.version: ThinkPad X250
dmi.sys.vendor: LENOVO

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: amd64 apport-bug xenial

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  Lenovo X250 failes to suspend after being docked

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