[ubuntu] Experiencing an internal error on Ubuntu 12.04

Hi,
I am sorry if I am posting an old issue that's already been discussed. My problem is that when ever I am loging in to Ubuntu 12.04, I get a message in a dialog box which says

"Sorry, Ubuntu 12.04 has experience an internal error" and the error detail indicates

ExecutablePath
/usr/bin/Xorg
Package
xserver-xorg-core-lts-raring 2:1.13.3-0ubuntu6~precise2
ProblemType
Crash
Title
Xorg crashed with SIGSEGV in mieqProcessDeviceEvent()
ApportVersion
2.0.1-0ubuntu17.4
Architecture
amd64

My hardware Intel 64-bit. Just fyi, It is a newly re-installed Ubuntu-12.04.

I am hoping if anybody can help me with the solution for this problem. I am still learning so, a detailed solution is even better.

Regards,