Keyboard backspace behavior at boot-time decryption passphrase

Quote:

OS: Kali Linux 2020.4 System: Acer Predator 17 (G9-791) w/ German keyboard. ** firmware-linux_20201218-3_all.deb (Debian Sid [testing]) installed Encrypted layout: LVM on LUKS2: / /home swap Non-encrypted: /boot /boot/efi

At the passphrase prompt, the backspace key adds a masked character to the passphrase entry box. Behavior should be deletion of previous character.

My attempted solution:

• Default boot into Kali
  Code:# dpkg-reconfigure keyboard-configuration.
• Code:Generic 105-key PC (intl.)
  English (US) - English (US, euro on 5)
  AltGr: Default for the keyboard layout
  Compose: No compose key
  Ctl+Atl+Backspace to terminate X = YesOn reboot, backspace behavior is as initially described.
• Afterward:
• Code:sudo nano /etc/initramfs-tools/initramfs.conf,
• modify,
  Code:KEYMAP=n,
  to,
  Code:KEYMAP=y.
• Code:$ sudo update-initramfs -uv.
  On reboot, backspace behavior is as initially described.

The backspace works as it should once the OS is operational.

Tips or suggestions on solving or troubleshooting the issue are appreciated.