Comment 5 for bug 1822736

Booted up a Ubuntu 14.04 LTS box & followed test procedure.

Same result - steps followed fine until I once 256 char password was entered, I was unable to `sudo whoami` (password was not accepted)

OS: Ubuntu 14.04.6 LTS x86_64
Host: HP Compaq dc7700 Small Form Factor
Kernel: 3.13.0-168-generic
Uptime: 22 mins
Packages: 2377 (dpkg)
Shell: bash 4.3.11
Theme: Ambiant-MATE [GTK3]
Icons: Ambiant-MATE [GTK3]
Terminal: gnome-terminal
CPU: Intel Core 2 6320 (2) @ 1.867GHz
GPU: NVIDIA Quadro NVS 290
Memory: 1071MiB / 4896MiB

test@dc7700ub:~$ apt-cache policy libpam0g
libpam0g:
  Installed: 1.1.8-1ubuntu2.2
  Candidate: 1.1.8-1ubuntu2.2
  Version table:
 *** 1.1.8-1ubuntu2.2 0
        500 http://ftp.iinet.net.au/pub/ubuntu/ trusty-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
        100 /var/lib/dpkg/status
     1.1.8-1ubuntu2 0
        500 http://ftp.iinet.net.au/pub/ubuntu/ trusty/main amd64 Packages