Same issue when upgrading from Ubuntu 14.04 to 16.04. Note - using LUKS encryption and have nVidia video.
Did a fresh install of Ubuntu 16.04 using LUKS encryption which installed 4.4.0-21 and login worked until I ran upgrades (which installed 4.4.0-34). Now have the cannot type characters into the box to unlock the disk problem again. Notes: * If I boot in recovery mode I can enter password, just not with a normal boot. * If a change my /etc/grub/default to be "quite nosplash", I can enter password in text mode. System info: * System76 Leopard Extreme * 1 GB nVidia GeForce GTX 750 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1386005 Title: Password not accepted graphical boot for encrypted root system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/1386005/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
