I have the same problem when I plugged my notebook only with original
power adapter. So it will be probably issue between bios/firmware-
kernel.

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https://bugs.launchpad.net/bugs/1890415

Title:
  Lenovo ThinkPad X390 won’t boot while plugged in

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Hello. I’m using Lenovo ThinkPad X390 Yoga (model type: 20NN002NMC). I have 
been using dual boot of the preinstalled Windows 10 x64 and Linux. I have tried 
the latest versions of Ubuntu and Debian. About 6 weeks ago, after updating the 
BIOS to N2LET76W 1.75 (https://download.lenovo.com/pccbbs/mobiles/n2lur14w.txt) 
and the Intel Management Engine Firmware (12.0.67.1579), an issue arose.
  When I boot to Ubuntu 20.04.1 (kernel 5.4.0-42-generic) using the Grub 
bootloader with active Secure Boot (fully supported), and then I turn the 
notebook off or restart it in Ubuntu, it won’t turn back on – it won’t POST, 
the screen is black, etc. After that time, I need to unplug the notebook from 
the power adapter, or remove it from the dock, and it will boot on battery. But 
it won’t boot while plugged in until it boots into Windows and is turned 
off/restart from it. After booting to Windows, it works fine while plugged in, 
until it is turned off in Ubuntu again. I have tried install recommend drivers 
and software..
  It looks like a BIOS/Firmware error related to power management. I’m using 
the latest BIOS/Firmware updated via the official Lenovo software – Lenovo 
Vantage (bios version 1.76). Notebook was sent to Lenovo for repairs, the 
motherboard was replaced, yet the problem persists – hence thinking it’s 
BIOS/Firmware related.
  Lenovo claims it’s Linux’s issue, even though the list it as officially 
supported (https://support.lenovo.com/sk/en/solutions/pd031426) and there refer 
me to the community. Lenovo stuff inform me too, that this issue may be related 
to requirements Windows 10 v2004.
  Many thanks for your help.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: linux-image-5.4.0-42-generic 5.4.0-42.46
  ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
  Uname: Linux 5.4.0-42-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  mato       1576 F.... pulseaudio
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Aug  5 11:36:45 2020
  InstallationDate: Installed on 2020-08-02 (2 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  MachineType: LENOVO 20NN002NMC
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=sk_SK.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 i915drmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-42-generic 
root=UUID=ca486d67-1377-47fb-93c3-cfb279657f9d ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-5.4.0-42-generic N/A
   linux-backports-modules-5.4.0-42-generic  N/A
   linux-firmware                            1.187.2
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/16/2020
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N2LET76W (1.76 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20NN002NMC
  dmi.board.vendor: LENOVO
  dmi.board.version: 0B98417 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 31
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: 
dmi:bvnLENOVO:bvrN2LET76W(1.76):bd06/16/2020:svnLENOVO:pn20NN002NMC:pvrThinkPadX390Yoga:rvnLENOVO:rn20NN002NMC:rvr0B98417WIN:cvnLENOVO:ct31:cvrNone:
  dmi.product.family: ThinkPad X390 Yoga
  dmi.product.name: 20NN002NMC
  dmi.product.sku: LENOVO_MT_20NN_BU_Think_FM_ThinkPad X390 Yoga
  dmi.product.version: ThinkPad X390 Yoga
  dmi.sys.vendor: LENOVO

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