Cannot type disk decryption password during boot

The GUI loads to input the decryption password, but when I type, the characters appear in the top-left of my screen, as though I was typing at a console without a command prompt.

Forcing power-off and rebooting allows access to the grub menu, from recovery mode I can type my decryption password without the GUI, and from recovery, I can resume booting.


Solution 1:

So you don't have to use recovery mode every time:

  1. Open a console and type the command

    sudo gedit /etc/default/grub
    
  2. Look for the line with

    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
    
  3. and change it to

    GRUB_CMDLINE_LINUX_DEFAULT=""
    
  4. Then update the grub bootloader with the command

    sudo update-grub
    

tested using Ubuntu 16.04 LTS


I have caused the same problem on my own system by using this guide: Fix low resolution grub and splash screen with Nvidia drivers on Ubuntu 14.04, which says:

  1. Edit grub:

    GRUB_GFXMODE=1280x1024
    GRUB_GFXPAYLOAD_LINUX=keep
    
  2. and update the bootloader

    sudo update-grub
    
  3. Then, create a file (named splash)

    sudo nano /etc/initramfs-tools/conf.d/splash
    
  4. Fill it with the following line

    echo FRAMEBUFFER=y
    
  5. and run the command

    sudo update-initramfs -u