Hello, same exact problem here on an up to date Debian Jessie (64 bits). Some days ago, probably after an update,, I suddenly had a rough time entering my password on boot (LVM on LUKS, except for the boot) with a qwerty conf while my keyboard is azerty. It did occur also on first install of Debian Jessie, but then my password was much simpler with no non a-z1-9 character, which was simple to enter even with the qwerty conf.
Remembering the previous posts on this bug and the solution I had already used, I then issued a : Sudo dpkg-reconfigure keyboard-configuration && sudo update-initramfs -k all -u It saved my bacon. Regards, -- Chris