[Bug 1871637] Re: [flicker free boot] boot image disappears for a second before LUKS prompt

[Daniel van Vugt]

*** This bug is a duplicate of bug 1836858 ***
    https://bugs.launchpad.net/bugs/1836858

Thank you for taking the time to report this bug and helping to make
Ubuntu better. This particular bug has already been reported and is a
duplicate of bug 1836858, so it is being marked as such. Please look at
the other bug report to see if there is any missing information that you
can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report. Feel free to continue to report any other bugs you may
find.


** This bug has been marked a duplicate of bug 1836858
   Display flickers (monitor loses signal briefly) during "flickerfree" boot, while showing the BIOS logo on a black background

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https://bugs.launchpad.net/bugs/1871637

Title:
  [flicker free boot] boot image disappears for a second before LUKS
  prompt

Status in plymouth package in Ubuntu:
  New

Bug description:
  The display goes black at some point after BIOS boot and LUKS prompt,
  where original boot image is restored alongside Ubuntu's boot bits.

  Best shown in a video: https://www.youtube.com/watch?v=YUtlE6YkFuk

  Dell XPS 9560

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: plymouth 0.9.4git20200323-0ubuntu5
  ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
  Uname: Linux 5.4.0-21-generic x86_64
  ApportVersion: 2.20.11-0ubuntu24
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CurrentDesktop: Unity
  Date: Wed Apr  8 14:17:01 2020
  DefaultPlymouth: /usr/share/plymouth/themes/bgrt/bgrt.plymouth
  InstallationDate: Installed on 2019-08-17 (234 days ago)
  InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
  MachineType: Dell Inc. XPS 15 9560
  ProcCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-21-generic root=/dev/mapper/vglinux-root ro quiet splash vt.handoff=7
  ProcFB: 0 i915drmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-21-generic root=/dev/mapper/vglinux-root ro quiet splash vt.handoff=7
  SourcePackage: plymouth
  TextPlymouth: /usr/share/plymouth/themes/ubuntu-text/ubuntu-text.plymouth
  UpgradeStatus: Upgraded to focal on 2020-03-31 (7 days ago)
  dmi.bios.date: 11/17/2019
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.18.0
  dmi.board.name: 05FFDN
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 10
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvr1.18.0:bd11/17/2019:svnDellInc.:pnXPS159560:pvr:rvnDellInc.:rn05FFDN:rvrA00:cvnDellInc.:ct10:cvr:
  dmi.product.family: XPS
  dmi.product.name: XPS 15 9560
  dmi.product.sku: 07BE
  dmi.sys.vendor: Dell Inc.

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