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[Minhaz Haque <2064909@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Test hardware 1 (Lubuntu 24.04 and Kubuntu 24.04):
VirtualBox, 2 CPUs, 8192 MB RAM, 128 MB VRAM, EFI disabled, Host I/O cache disabled.

Test hardware 2 (Kubuntu 24.04):
Intel Core i5 7400, 32 GB DDR4 RAM, RTX 3060 12 GB.

Language and locale: en_US.UTF-8.
Keyboard: Generic 105-key PC.

During installation, I selected manual partitioning, created an ext4
partition, checked the encrypt box, entered a passphrase, selected "/"
as mount point, and proceeded with the installation. But after reboot
when it asks for the encryption passphrase, and the passphrase is
entered correctly, it immediately shows an error like this:

error: Invalid passphrase.
error: disk 'cryptouuid/abc123...' not found.
Entering rescue mode...
grub rescue>

This same problem occurs in both Lubuntu 24.04 and Kubuntu 24.04. But
the same installation steps work just fine with Lubuntu 22.04.4. I tried
different installation settings (VirtualBox/PC, MBR/GPT, BIOS/EFI, etc.)
and all resulted in the same error.

This bug report is a followup of this question in Ask Ubuntu:
https://askubuntu.com/questions/1512978

** Affects: calamares (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2064909

Title:
  Lubuntu and Kubuntu 24.04 fail to decrypt on boot when installed on
  encrypted partition

Status in calamares package in Ubuntu:
  New

Bug description:
  Test hardware 1 (Lubuntu 24.04 and Kubuntu 24.04):
  VirtualBox, 2 CPUs, 8192 MB RAM, 128 MB VRAM, EFI disabled, Host I/O cache disabled.

  Test hardware 2 (Kubuntu 24.04):
  Intel Core i5 7400, 32 GB DDR4 RAM, RTX 3060 12 GB.

  Language and locale: en_US.UTF-8.
  Keyboard: Generic 105-key PC.

  During installation, I selected manual partitioning, created an ext4
  partition, checked the encrypt box, entered a passphrase, selected "/"
  as mount point, and proceeded with the installation. But after reboot
  when it asks for the encryption passphrase, and the passphrase is
  entered correctly, it immediately shows an error like this:

  error: Invalid passphrase.
  error: disk 'cryptouuid/abc123...' not found.
  Entering rescue mode...
  grub rescue>

  This same problem occurs in both Lubuntu 24.04 and Kubuntu 24.04. But
  the same installation steps work just fine with Lubuntu 22.04.4. I
  tried different installation settings (VirtualBox/PC, MBR/GPT,
  BIOS/EFI, etc.) and all resulted in the same error.

  This bug report is a followup of this question in Ask Ubuntu:
  https://askubuntu.com/questions/1512978

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