*** This bug is a duplicate of bug 1848445 ***
    https://bugs.launchpad.net/bugs/1848445

** This bug has been marked a duplicate of bug 1848445
   Kernel needs a special workaround argument to boot

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https://bugs.launchpad.net/bugs/1848017

Title:
  Kernel needs a special workaround argument to boot

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  1) The release of Ubuntu you are using, via 'lsb_release -rd' or System -> 
About Ubuntu
  Description:  Ubuntu 19.04
  Release:      19.04

  
  2) The version of the package you are using, via 'apt-cache policy pkgname' 
or by checking in Software Center

  3) What you expected to happen

  Boot

  4) What happened instead

  Freezes (see below for workaround), no visible sign of interaction
  possible. Caps lock "led" doesn't work indicating keyboard isn't
  working. Just a white cursor (non blinking) on screen, CPU doesn't
  seem to do anything since fan stops after a while.

  This is more likely a Linux "bug". Unless you pass acpi_osi= argument
  to Linux kernel, it won't boot, appear and behave frozen with a (non
  blinking) cursor on top left. There is no further information given to
  user further complicating things.

  Previously on 4.x kernels, system would boot using acpi=off argument
  creating more problems on this particular laptop model (HP Pavilion
  X360 13 inch).

  As they are for proprietary broadcom bcm43142 chip, I am not adding
  further arguments in this bug report. Can tell on request if needed.

  ProblemType: Bug
  DistroRelease: Ubuntu 19.04
  Package: linux-image-5.0.0-31-generic 5.0.0-31.33
  ProcVersionSignature: Ubuntu 5.0.0-31.33-generic 5.0.21
  Uname: Linux 5.0.0-31-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.10-0ubuntu27.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ilgaz      1897 F.... pulseaudio
   /dev/snd/controlC1:  ilgaz      1897 F.... pulseaudio
   /dev/snd/pcmC1D0p:   ilgaz      1897 F...m pulseaudio
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Oct 14 15:33:41 2019
  HibernationDevice: RESUME=UUID=f34af719-8757-473b-848b-7db85d6fefae
  InstallationDate: Installed on 2019-10-13 (1 days ago)
  InstallationMedia: Ubuntu 16.04.6 LTS "Xenial Xerus" - Release amd64 
(20190227)
  MachineType: Hewlett-Packard HP Pavilion 13 x360 PC
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.0.0-31-generic 
root=UUID=f6787f82-d072-410e-8058-2b7f14d012b9 ro verbose pci=biosirq acpi_osi=
  RelatedPackageVersions:
   linux-restricted-modules-5.0.0-31-generic N/A
   linux-backports-modules-5.0.0-31-generic  N/A
   linux-firmware                            1.178.3
  SourcePackage: linux
  UpgradeStatus: Upgraded to disco on 2019-10-13 (0 days ago)
  dmi.bios.date: 06/21/2018
  dmi.bios.vendor: Insyde
  dmi.bios.version: F.41
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: 2341
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: 07.0A
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnInsyde:bvrF.41:bd06/21/2018:svnHewlett-Packard:pnHPPavilion13x360PC:pvr0977120000405F00000410180:rvnHewlett-Packard:rn2341:rvr07.0A:cvnHewlett-Packard:ct10:cvrChassisVersion:
  dmi.product.family: 103C_5335KV G=N L=CON B=HP S=PAV X=Null
  dmi.product.name: HP Pavilion 13 x360 PC
  dmi.product.sku: L0B89EA#AB8
  dmi.product.version: 0977120000405F00000410180
  dmi.sys.vendor: Hewlett-Packard

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