Bug#757294: grub: Cannot boot to rescue mode

[root]

Source: grub
Version: 2.00-22
Severity: important

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?  Trying to boot to single-user.
   * What exactly did you do (or not do) that was effective (or
     ineffective)?  Tried to boot to rescue mode.
   * What was the outcome of this action?  It asked for root password or <ctrl>D so I gave 
password.  It gave me the command-prompt.  But when I type one character it goes back to asking
 for the root password or <ctrl>D.  I type in the password but it says that's wrong but
gives the root prompt again.  I give a command but after the first character it givves
the message to enter the root password of <ctrl>D, so I re-enter the correct root password
 over and over but it says it's wrong.  Alternately it gives the root prompt.


   * What outcome did you expect instead?  To be able to enter commands as root.


-- System Information:
Debian Release: jessie/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.14-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash