Detect Monitor crashes the system with Nvidia Drivers in Linux Mint 13, Mate

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http://unix.stackexchange.com – I am using Linux Mint 13 - Mate in my Laptop and I am new to Linux. Configuration - i3 Processor, nVidia GeForce GT 420M. I am using a external monitor from Benq Corporation. I installed the latest nVidia drivers 310.19 from here. When I start the nVidia X configuration tool and click on the "Detect Monitor" button, the laptop screen shows some distorted pictures and the external monitor shows just the background image but tiled. Also the mouse pointer is placed in the center left corner of the external monitor. However, When I start my laptop with the external monitor connected. The logi (HowTos)