Adding onto this bug because I also have the same problem while running Ubuntu 15.04 on a Lenovo T450s.
As with the other users attempting to boot puts you into the decrypt screen with a nice empty password box, but keyboard strokes do not appear to register, as if the decryption password had not been selected. The keyboard does recognize ctrl+alt+delete, which reboots into grub and hence into the same text-based decryption window that lets you enter your password. This is a recent problem for me. I upgraded to 15.04 some time ago, but the problem only really appeared within the last week, possibly due to a dist-upgrade to linux-image-3.19.0-28 or linux-image-3.19.0-30. Unfortunately I'm not sure which upgrade I did when, and what else came in at the same time (I let my laptop sit a little too long without rebooting). -- 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
