Satellite C855-1CU itself turn on without reason by using Ubuntu

Hi all,

I hope someone can help, I have a laptop TOSHIBA C855-1CU
I installed Ubuntu 12.10 on a partition and a WINDOWS 7 on another partition
the question is: if I turn off my PC from Ubuntu then remains off for about 4 to 7 seconds and turn on then she self without any reason!

Knowing that the same thing is happening with my friends who have the same specifications.
Thanks in advance.

And when you finish the session Windows everything is OK?

Tags: Toshiba

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