*** This bug is a duplicate of bug 1975650 ***
    https://bugs.launchpad.net/bugs/1975650

@alextcranglesim
This bug is not necessarily a duplicate of the referred bug 
https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-510/+bug/1975650
It just happened to also arise in some cases with Kernel updates but this is 
just the last instance of it happening. 
The black screen with blinking cursor happened to me many times in the past 
when during a fresh install not installing proprietary drivers and later on 
installing nVidia drivers downloaded from nVidia. 
You can search the internet for 'black screen', 'ubuntu', 'blinking cursor', 
'nVidia'... and will find plenty of issues reported but none of the solutions 
ever worked for me. 
The point is that I previously never knew how to handle this situation and 
resorted to a fresh install as I though my system was definitely broken. 
This is until I realized that it is still possible to access the system with 
some keyboard commands as explained above in order to start up Ubuntu and to 
restore its proper startup behaviour by subsequently updating the driver to the 
proprietary tested version, which was by the way only the last step in solving 
the black screen issue.
The other bug report only provides the code to restore the drivers but not what 
to do when the system is hanging with the black screen.

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https://bugs.launchpad.net/bugs/1990750

Title:
  Boot issue with Ubuntu 22.10 Kinetic Kudu since Kernel 5.19.0.15.15,
  now hanging with blinking cursor after update to Kernel 5.19.0.21.21

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  When starting the PC, the splash screen freezes with the motherboard logo 
displayed.
  As my disk is encrypted the decryption field does not appear below the logo.

  By typing [ALT] + [CTRL] + [DEL] then the splash screen appears again 
followed by a start-up menu with the following line:
  *Ubuntu
   Advanced options for Ubuntu

  By selecting 'Advanced options for Ubuntu' the following submenu appears:
  *Ubuntu, with Linux5.19.0-15-generic
   Ubuntu, with Linux5.19.0-15-generic (recovery mode)

  Selecting the second option, then the system starts loading with the initial 
lines of code:
  Loading Linux 5.19.0-15-generic ...
  Loading initial ramdisk ...

  When code has finished loading, the last line at the bottom of the screen is 
for unlocking the disk:
  Begin: Mounting root fie system ... Begin Running /script/local-top ... 
Please unlock disk nvme0n1p3_crypt:

  Then i type in the code and hit [return] and more code is loading, until a 
recovery menu with purple background appears, with the title:
  Recovery Menu (filesystem state: read-only).

  I select the first menu item:
  resume          Resume normal boot
  and hit [return].

  The menu changes to the notification:
  You are now going to exit the recovery mode bla bla bla
  with the [OK] button below it.

  I hit the [OK] button and then the login screen finally appears.

  I will post a video of the complete boot sequence later on as I need
  to install a softaware to edit the video.

  It is noteworthy that on my previous Ubuntu 22.04 install the same
  issue with the frozen splash screen occurred when my system was
  updated with Kernel 5.15.5, but then I did not try out to execute the
  [ALT] + [CTRL] + [DEL] command.

  Therefore the bug is probably affecting all kernels from 5.15.5
  upwards.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.10
  Package: linux-image-5.19.0-15-generic 5.19.0-15.15
  ProcVersionSignature: Ubuntu 5.19.0-15.15-generic 5.19.0
  Uname: Linux 5.19.0-15-generic x86_64
  NonfreeKernelModules: nvidia_modeset wl nvidia
  ApportVersion: 2.23.0-0ubuntu2
  Architecture: amd64
  CRDA: N/A
  CasperMD5CheckResult: pass
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Sep 25 08:30:29 2022
  InstallationDate: Installed on 2022-09-24 (0 days ago)
  InstallationMedia: Ubuntu 22.10 "Kinetic Kudu" - Alpha amd64 (20220920)
  MachineType: Gigabyte Technology Co., Ltd. Z97X-UD5H
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.19.0-15-generic 
root=/dev/mapper/vgubuntu-root ro recovery nomodeset dis_ucode_ldr
  RelatedPackageVersions:
   linux-restricted-modules-5.19.0-15-generic N/A
   linux-backports-modules-5.19.0-15-generic  N/A
   linux-firmware                             20220923.gitf09bebf3-0ubuntu1
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/03/2015
  dmi.bios.release: 4.6
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F10
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: Z97X-UD5H
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrF10:bd08/03/2015:br4.6:svnGigabyteTechnologyCo.,Ltd.:pnZ97X-UD5H:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ97X-UD5H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:skuTobefilledbyO.E.M.:
  dmi.product.family: To be filled by O.E.M.
  dmi.product.name: Z97X-UD5H
  dmi.product.sku: To be filled by O.E.M.
  dmi.product.version: To be filled by O.E.M.
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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