/var/log/apt/history.log :

Start-Date: 2011-11-22  21:40:43
Commandline: aptdaemon role='role-commit-packages' sender=':1.44'
Install: linux-headers-3.0.0-13-generic:amd64 (3.0.0-13.22), linux-headers-3.0.0-13:amd64 (3.0.0-13.22), libexo-helpers:amd64 (0.6.2-2ubuntu0.1), linux-image-3.0.0-13-generic:amd64 (3.0.0-13.22)
Upgrade: xfce4-power-manager:amd64 (1.0.10-4, 1.0.10-4ubuntu0.1), libbrlapi0.5:amd64 (4.2-8ubuntu5, 4.2-8ubuntu5.1), libcupsppdc1:amd64 (1.5.0-8ubuntu4, 1.5.0-8ubuntu5), libcupsimage2:amd64 (1.5.0-8ubuntu4, 1.5.0-8ubuntu5), libcupsimage2:i386 (1.5.0-8ubuntu4, 1.5.0-8ubuntu5), libcupscgi1:amd64 (1.5.0-8ubuntu4, 1.5.0-8ubuntu5), libcupsdriver1:amd64 (1.5.0-8ubuntu4, 1.5.0-8ubuntu5), brltty-x11:amd64 (4.2-8ubuntu5, 4.2-8ubuntu5.1), ghostscript-cups:amd64 (9.04~dfsg-0ubuntu11, 9.04~dfsg-0ubuntu11.1), linux-generic:amd64 (3.0.0.12.14, 3.0.0.13.15), libexo-common:amd64 (0.6.2-2, 0.6.2-2ubuntu0.1), cups-client:amd64 (1.5.0-8ubuntu4, 1.5.0-8ubuntu5), brltty:amd64 (4.2-8ubuntu5, 4.2-8ubuntu5.1), ttf-opensymbol:amd64 (2.4.3+LibO3.4.3-3ubuntu2, 2.4.3+LibO3.4.4-0ubuntu1), libgs9-common:amd64 (9.04~dfsg-0ubuntu11, 9.04~dfsg-0ubuntu11.1), software-center:amd64 (5.0.2, 5.0.2ubuntu0.1), cups-ppdc:amd64 (1.5.0-8ubuntu4, 1.5.0-8ubuntu5), xserver-xorg-video-intel:amd64 (2.15.901-1ubuntu2, 2.15.901-1ubuntu2.1), cups-common:amd64 (1.5.0-8ubuntu4, 1.5.0-8ubuntu5), libcups2:amd64 (1.5.0-8ubuntu4, 1.5.0-8ubuntu5), libcups2:i386 (1.5.0-8ubuntu4, 1.5.0-8ubuntu5), linux-headers-generic:amd64 (3.0.0.12.14, 3.0.0.13.15), linux-image-generic:amd64 (3.0.0.12.14, 3.0.0.13.15), cups:amd64 (1.5.0-8ubuntu4, 1.5.0-8ubuntu5), ghostscript-x:amd64 (9.04~dfsg-0ubuntu11, 9.04~dfsg-0ubuntu11.1), xfce4-power-manager-data:amd64 (1.0.10-4, 1.0.10-4ubuntu0.1), nautilus-data:amd64 (3.2.1-0ubuntu2, 3.2.1-0ubuntu3.1), libgs9:amd64 (9.04~dfsg-0ubuntu11, 9.04~dfsg-0ubuntu11.1), cups-bsd:amd64 (1.5.0-8ubuntu4, 1.5.0-8ubuntu5), libexo-1-0:amd64 (0.6.2-2, 0.6.2-2ubuntu0.1), libnautilus-extension1:amd64 (3.2.1-0ubuntu2, 3.2.1-0ubuntu3.1), ghostscript:amd64 (9.04~dfsg-0ubuntu11, 9.04~dfsg-0ubuntu11.1), exo-utils:amd64 (0.6.2-2, 0.6.2-2ubuntu0.1), linux-libc-dev:amd64 (3.0.0-12.20, 3.0.0-13.22), libcupsmime1:amd64 (1.5.0-8ubuntu4, 1.5.0-8ubuntu5)
End-Date: 2011-11-22  21:43:57

/var/log/syslog :

Nov 23 13:01:25 dell lightdm: pam_ecryptfs: Passphrase file wrapped
Nov 23 13:01:25 dell lightdm: do_hash: PK11_HashBuf() error; SECFailure = [-1]; PORT_GetError() = [-8128]
Nov 23 13:01:25 dell lightdm: Error generating passphrase signature; rc = [-22]
Nov 23 13:01:25 dell lightdm: Error attempting to unwrap passphrase from file [/home/asia/.ecryptfs/wrapped-passphrase]; rc = [-22]
Nov 23 13:01:25 dell lightdm: pam_ecryptfs: Error adding passphrase key token to user session keyring; rc = [-5]