[Bug 1813765] Re: Freeze on Lenovo laptop in dock station

Experienced the same problem as the OP. Downgrading to 4.15.0-43 worked
for as well. The only difference is that my laptop is Dell E7450.

To be more specific, With dock and an external screen the system freezes
when I close the laptop lid. When booting with the laptop lid is closed,
the system does not even get to login screen. With laptop lid open
everything works. With laptop not in dock everything works.

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Title:
Freeze on Lenovo laptop in dock station

Status in linux package in Ubuntu:
Confirmed

Bug description:
I have a Lenovo T470s laptop with a Thinkpad Ultra dock.

After upgrading kernel to 4.15.0-44, the system freeze and has to be
hard reset (hold power button for 7 seconds) when booting, unlocking
or changing display configuration when in dock.

I downgraded the kernel to 4.15.0-43 and the problem went away.

(The system information is collected after downgraded the kernel to
4.15.0-43 and removing 4.15.0-44.)

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-44-generic (not installed)
ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
Uname: Linux 4.15.0-43-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: mikaelstaldal 2219 F.... pulseaudio
CurrentDesktop: Unity:Unity7:ubuntu
Date: Tue Jan 29 13:20:45 2019
HibernationDevice: RESUME=UUID=3c08f9f9-c1a9-43fa-97c9-5dc4873f87d9
InstallationDate: Installed on 2018-10-12 (108 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
MachineType: LENOVO 20HF004UMX
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-43-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=1
RelatedPackageVersions:
linux-restricted-modules-4.15.0-43-generic N/A
linux-backports-modules-4.15.0-43-generic N/A
linux-firmware 1.173.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/27/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: N1WET25W (1.04 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20HF004UMX
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrN1WET25W(1.04):bd12/27/2016:svnLENOVO:pn20HF004UMX:pvrThinkPadT470s:rvnLENOVO:rn20HF004UMX:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad T470s
dmi.product.name: 20HF004UMX
dmi.product.version: ThinkPad T470s
dmi.sys.vendor: LENOVO

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