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Date:      Tue, 4 May 2010 23:38:09 +0300
From:      Kostik Belousov <kostikbel@gmail.com>
To:        David DEMELIER <demelier.david@gmail.com>
Cc:        Giovanni Trematerra <giovanni.trematerra@gmail.com>, freebsd-stable@freebsd.org, freebsd-acpi@freebsd.org
Subject:   Re: Kernel panic when unpluggin AC adaptor
Message-ID:  <20100504203809.GR23646@deviant.kiev.zoral.com.ua>
In-Reply-To: <i2qb3954bba1005041327v72795c19va26e23dbb79159b9@mail.gmail.com>
References:  <i2rb3954bba1005040132z817cc785gfbfd2bb520d87cfc@mail.gmail.com> <20100504083738.GA23820@icarus.home.lan> <i2mb3954bba1005040141m97cbd6b0u69651cb26992ee97@mail.gmail.com> <20100504085332.GA24219@icarus.home.lan> <n2gb3954bba1005040351o718a9508u8e992b0469137bdf@mail.gmail.com> <r2p4e6cba831005040836y43a0bb21x82b4b25334a755fa@mail.gmail.com> <y2yb3954bba1005040927l538ef077q20aea7a4c5121fdd@mail.gmail.com> <h2ub3954bba1005040935h7e5207b2o399c357a1cfd407@mail.gmail.com> <20100504200139.GP23646@deviant.kiev.zoral.com.ua> <i2qb3954bba1005041327v72795c19va26e23dbb79159b9@mail.gmail.com>

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On Tue, May 04, 2010 at 10:27:23PM +0200, David DEMELIER wrote:
> 2010/5/4 Kostik Belousov <kostikbel@gmail.com>:
> > On Tue, May 04, 2010 at 06:35:52PM +0200, David DEMELIER wrote:
> >> Good news ! It worked, check the picture here :
> >>
> >> http://img63.imageshack.us/img63/4244/dsc00361g.jpg
> >
> > Please try adding code fragment like this:
> > =9A =9A =9A =9Aif (cx_next->p_lvlx =3D=3D NULL)
> > =9A =9A =9A =9A =9A =9A =9A =9Aprintf("Going to panic.\n");
> > to =9Adev/acpi/acpi_cpu.c:acpi_cpu_idle() function, right before
> > =9A =9ACPU_GET_REG(cx_next->p_lvlx, 1);
> > line and see if it prints the message immediately before the panic.
> >
>=20
> Yes it does at the beginning of the kernel panic.

Ok, so the point of panic is found, it is NULL cx_next->p_lvlx resource.
With the data in hand, I recommend you to ask on acpi@ (added a Cc:)
about the cause and possible solution.

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