Strange logon start up problem

Hi:

After years of no problems with my Ubuntu 12.04, today my laptop began experiencing the following problem. When I get to the logon screen, it apparently freezes. Regardless, I type my password and hit enter. Nothing happens. I wait like a minute or a minute and a half and suddenly the password shows in the box (I mean, the dots representing the password) and the machine resumes the logon process and operates normally. How do I troubleshoot this problem? Your help is appreciated.

Here's some info of my machine:

williepabon@williepabon-VGN-N130G:~$ uname -a
Linux williepabon-VGN-N130G 3.2.0-61-generic-pae #92-Ubuntu SMP Tue Apr 1 00:10:04 UTC 2014 i686 i686 i386 GNU/Linux

williepabon@williepabon-VGN-N130G:~$ lsb_release -a
LSB Version: core-2.0-ia32:core-2.0-noarch:core-3.0-ia32:core-3.0-noarch:core-3.1-ia32:core-3.1-noarch:core-3.2-ia32:core-3.2-noarch:core-4.0-ia32:core-4.0-noarch
Distributor ID: Ubuntu
Description: Ubuntu 12.04.4 LTS
Release: 12.04
Codename: precise

williepabon@williepabon-VGN-N130G:~$ grub-install -v
grub-install (GRUB) 1.99-21ubuntu3.14