Bug#611099: looks like kernel 2.6.32-31 fixed the issue

[Спицын Андрей <einhander@pisem.net>]

Not for me. I tried kernels 2.6.32-31 till 2.6.32-34, but reboots not
gone.
Now I'm using 2.6.38-5 and it solve the problem.

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Best regards,
Andrey Spitsyn.