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Now I have advance problem while booting Ubuntu 12.04.2 LTS, pointer of mouse is stuck and freeze at one point but the keys of keyboard is freezing and stuck at the middle of the screen and after some time the system have been crash and the fan of laptop is running very annoyingly. finally the system become heated.....and crashed please help me

thanking you

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This is not a general issue with 12.04 LTS, but rather with you particular PC or hardware configuration. Please add some detail: brand/model, CPU, RAM, graphics, etc. – david6 Mar 29 '13 at 22:03

It sounds like your cooling system might be clogged/ with dust. The hardware is told to do this when it gets too hot, and when the temps go critical, the system will turn off until it cools down. BTW the graphics chip cooling system is normally attached to the CPU cooling system.

You should take it to be fixed. Once the dust is removed it shouldn't crash.

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