System crash with dual monitor setup

[boris]

Laptop crashes after successfully login with 2nd monitor attached. If I attach the monitor after login system crashes when changing display settings , e.g. monitor positions.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-44-generic 4.15.0-44.47
ProcVersionSignature: Ubuntu 4.15.0-44.47-generic 4.15.18
Uname: Linux 4.15.0-44-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: b 1883 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Tue Jan 29 15:32:04 2019
EcryptfsInUse: Yes
InstallationDate: Installed on 2018-10-30 (90 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
MachineType: LENOVO 20JWS09Q00
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-44-generic root=UUID=9354306a-00ba-43a3-85ce-209a58d47604 ro quiet splash vt.handoff=1
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-44-generic N/A
 linux-backports-modules-4.15.0-44-generic N/A
 linux-firmware 1.173.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/12/2018
dmi.bios.vendor: LENOVO
dmi.bios.version: N1VET45W (1.35 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20JWS09Q00
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40705 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrN1VET45W(1.35):bd07/12/2018:svnLENOVO:pn20JWS09Q00:pvrThinkPadT570W10DG:rvnLENOVO:rn20JWS09Q00:rvrSDK0J40705WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad T570 W10DG
dmi.product.name: 20JWS09Q00
dmi.product.version: ThinkPad T570 W10DG
dmi.sys.vendor: LENOVO