The initial problem was the disfunctional mouse, which shuts off at random intervals. Sad that the interval might be so long and is not predictable. Casual look at the problem seemed to be something to do with the OS since i'vent configured much things from the OS end. Later came to know it was not the problem with the OS but with the hardware itself. The more appropriate reasoning would be the dust accumulated in the ports. After clearing that it worked well, and was happy for a few days.
Now, the problem has repeated, but this time, with an additive, my keyboard is most of the times left-dead, meaning left portion of the keyboard, where most of my key-shortcuts would be configured is dead. There is no response when we press those keys. Thanks to GNU/Linux that does understands it needs to copy when you select text. Otherwise it would have become a nightmare copy/pasting the text. It was really restrictive to use my dear comp now . Have to fix it up. But the only puzzle now is i've cleaned up the dust in both keyboard/motherboard/mouse. Still the problem persists. This confirms the short at some point either in the keyboard circuit or the serial port connection.
How does it work at random times? Does it appears random? Have to carry out a few investigation, but now, presently, keeping mum, let the work get over 
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