And indeed, i have no such mod under /boot: attached hierarchy.

** Attachment added: "boot_tree.txt"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1829402/+attachment/5266957/+files/boot_tree.txt

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https://bugs.launchpad.net/bugs/1829402

Title:
  Purple screen hangup during boot

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Specs:
  Ubuntu 19.04 fresh install, everything updated
  Firmware is latest (Bios version 300)
  Asus vivobook s14 
  LVM disk encryption

  Steps to reproduce:
  - Install ubuntu 19.04/18.10
  - Reboot
  - Purple screen indefinitely

  Setting kernel cmdline args only to ro nomodeset seems solves it.

  After some debugging session with #ubuntu with different cmdline args,
  it seems now the default one works too. I have not edited anything,
  but now i am unable to reproduce it.

  ProblemType: Bug
  DistroRelease: Ubuntu 19.04
  Package: linux-image-5.0.0-15-generic 5.0.0-15.16
  ProcVersionSignature: Ubuntu 5.0.0-15.16-generic 5.0.6
  Uname: Linux 5.0.0-15-generic x86_64
  ApportVersion: 2.20.10-0ubuntu27
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  markbartos   1778 F.... pulseaudio
  Date: Thu May 16 17:15:07 2019
  InstallationDate: Installed on 2019-05-16 (0 days ago)
  InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 13d3:3526 IMC Networks 
   Bus 001 Device 002: ID 13d3:56c1 IMC Networks 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: ASUSTeK COMPUTER INC. VivoBook_ASUSLaptop X430FA_S430FA
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.0.0-15-generic 
root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=1
  PulseList:
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not 
accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-5.0.0-15-generic N/A
   linux-backports-modules-5.0.0-15-generic  N/A
   linux-firmware                            1.178.1
  SourcePackage: linux
  StagingDrivers: r8822be
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/22/2018
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: X430FA.300
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: X430FA
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrX430FA.300:bd11/22/2018:svnASUSTeKCOMPUTERINC.:pnVivoBook_ASUSLaptopX430FA_S430FA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX430FA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.family: VivoBook
  dmi.product.name: VivoBook_ASUSLaptop X430FA_S430FA
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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