I have the almost same issue with my Dell latitude E5520 plugged into the dock
station WD15. This issue occurred after the latest linux kernel upgrade (to
4.15.044.46).
At startup all my screen are correctly initialized. But when my computer enter
in power-save mode (i.e screen become black after a while), my laptop is not
responding anymore. I need to restart it. Notice that the "magic keys" works :
the sequence alt+sys+[s,u,b] restart the computer.
** Changed in: linux (Ubuntu Bionic)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1813663
Title:
External monitors does not work anymore 4.15.0-44
Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Bionic:
Fix Released
Bug description:
I am using a docking station for my laptop. After install the
4.15.0-44 update my external monitors goes undetected after logging in
or having the laptop closed.
I am on 18.04.1 LTS with Intel® HD Graphics 620 (Kaby Lake GT2)
Graphics.
Going back to the 4.15.0-43 version makes it all work fine again.
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: jonas 2407 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 18.04
HibernationDevice: RESUME=UUID=80397b76-2ded-4f7d-adbf-dfdface8e2d4
InstallationDate: Installed on 2018-10-17 (103 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64
(20180725)
MachineType: LENOVO 20HF004MMX
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-44-generic
root=UUID=64cf1582-d574-4e2f-a40a-7942c40caf5d ro quiet splash vt.handoff=1
ProcVersionSignature: Ubuntu 4.15.0-44.47-generic 4.15.18
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
Tags: bionic
Uname: Linux 4.15.0-44-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip docker kvm lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 09/14/2018
dmi.bios.vendor: LENOVO
dmi.bios.version: N1WET51W (1.30 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20HF004MMX
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:bvrN1WET51W(1.30):bd09/14/2018:svnLENOVO:pn20HF004MMX:pvrThinkPadT470s:rvnLENOVO:rn20HF004MMX:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad T470s
dmi.product.name: 20HF004MMX
dmi.product.version: ThinkPad T470s
dmi.sys.vendor: LENOVO
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