Public bug reported:

After upgrade to 4.13.0-38-generic my system (Acer S7 392) locks up after unity 
launches on startup. 
The mouse cursor is present but non responsive.
ctrl-alt-delete/backspace/F1/F2... have no effect. Power off by holding power 
button is the only way to shutdown.
Rebooting with 4.13.0-7-generic works as expected.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: linux-image-4.13.0-38-generic 4.13.0-38.43
ProcVersionSignature: Ubuntu 4.13.0-37.42-generic 4.13.13
Uname: Linux 4.13.0-37-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
 /dev/snd/controlC1:  jasper     2791 F.... pulseaudio
 /dev/snd/controlC0:  jasper     2791 F.... pulseaudio
CurrentDesktop: Unity:Unity7:ubuntu
Date: Sat Apr  7 17:49:22 2018
HibernationDevice: RESUME=UUID=26d3afe5-0e06-4669-8d23-c639f3ca7011
InstallationDate: Installed on 2015-04-14 (1089 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Beta amd64 (20150326)
MachineType: Acer Aspire S7-392
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.13.0-37-generic.efi.signed 
root=UUID=57b63ba3-bc33-40b5-931f-8654d6c5cab4 ro rootflags=subvol=@ noprompt 
persistent quiet splash vt.handoff=7
 linux-restricted-modules-4.13.0-37-generic N/A
 linux-backports-modules-4.13.0-37-generic  N/A
 linux-firmware                             1.169.3
SourcePackage: linux
UpgradeStatus: Upgraded to artful on 2017-10-30 (158 days ago) 05/20/2014
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V2.12
dmi.board.asset.tag: No Asset Tag Storm2
dmi.board.vendor: Acer
dmi.board.version: V2.12
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V2.12
dmi:bvnInsydeCorp.:bvrV2.12:bd05/20/2014:svnAcer:pnAspireS7-392:pvrV2.12:rvnAcer:rnStorm2:rvrV2.12:cvnAcer:ct10:cvrV2.12: Sharkbay System Aspire S7-392
dmi.product.version: V2.12
dmi.sys.vendor: Acer

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

** Tags: amd64 apport-bug artful

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  System lockup immediatly after Unity launches on upgrade to

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