https://askubuntu.com/questions/629922/linux-full-disk-encryption-password-prompt-completely-unreadable same problem:
This person has a similar problem. It looks like modifying the initramfs may
be a solution.
- Re: [Trisquel-users] Fresh Trisquel installation shows mystic... t8mf4nu6lizp
- Re: [Trisquel-users] Fresh Trisquel installation shows mystic... mnaus
- Re: [Trisquel-users] Fresh Trisquel installation shows mystic... mnaus
- Re: [Trisquel-users] Fresh Trisquel installation shows mystic... mnaus
- Re: [Trisquel-users] Fresh Trisquel installation shows mystic... mnaus
- Re: [Trisquel-users] Fresh Trisquel installation shows mystic... mnaus