Please test latest mainline kernel:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.6-rc4/

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https://bugs.launchpad.net/bugs/1864897

Title:
  booting 5.3.0-40 with encrypted disk fails

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Booting the laptop with 5.3.0-40 (Asus Vivo Book, AMD Ryzen 3) ends up
  in a blank screen. Selecting 5.3.0-29 in the grub menu instead works,
  i. e., "please unlock disk" is displayed and after doing so xubuntu
  19.10 is started. The installation is encrypted as provided by the
  installer. Is some different but might be related to bug #1863759.

  ProblemType: Bug
  DistroRelease: Ubuntu 19.10
  Package: ubuntu-release-upgrader-core 1:19.10.15.4
  ProcVersionSignature: Ubuntu 5.3.0-29.31-generic 5.3.13
  Uname: Linux 5.3.0-29-generic x86_64
  ApportVersion: 2.20.11-0ubuntu8.4
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: XFCE
  Date: Wed Feb 26 18:11:45 2020
  InstallationDate: Installed on 2019-10-17 (131 days ago)
  InstallationMedia: Xubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: release-upgrade
  UpgradeStatus: No upgrade log present (probably fresh install)
  VarLogDistupgradeAptlog:
   Log time: 2020-02-24 17:34:11.828555
   Starting pkgProblemResolver with broken count: 0
   Starting 2 pkgProblemResolver with broken count: 0
   Done
   None
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu8.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  al         1309 F.... pulseaudio
   /dev/snd/controlC0:  al         1309 F.... pulseaudio
  CurrentDesktop: XFCE
  DistroRelease: Ubuntu 19.10
  InstallationDate: Installed on 2019-10-17 (137 days ago)
  InstallationMedia: Xubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  MachineType: ASUSTeK COMPUTER INC. VivoBook_ASUSLaptop X512DA_F512DA
  Package: linux (not installed)
  ProcFB: 0 amdgpudrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.3.0-29-generic 
root=/dev/mapper/vgxubuntu-root ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 5.3.0-29.31-generic 5.3.13
  RelatedPackageVersions:
   linux-restricted-modules-5.3.0-29-generic N/A
   linux-backports-modules-5.3.0-29-generic  N/A
   linux-firmware                            1.183.4
  Tags:  eoan
  Uname: Linux 5.3.0-29-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 07/16/2019
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: X512DA.305
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: X512DA
  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.:bvrX512DA.305:bd07/16/2019:svnASUSTeKCOMPUTERINC.:pnVivoBook_ASUSLaptopX512DA_F512DA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX512DA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.family: VivoBook
  dmi.product.name: VivoBook_ASUSLaptop X512DA_F512DA
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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