linux-kernel - Re: ACPI initialization failure with v2.6.21-rc4

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Date:	Sun, 18 Mar 2007 22:52:16 +0800
From:	"Luming Yu" <luming.yu@...il.com>
To:	linux-kernel@...r.kernel.org, lenb@...nel.org
Subject: Re: ACPI initialization failure with v2.6.21-rc4

Do you recall which acpi enabled kernel works for you?
If never, I guess your system don't support ACPI .
If yes, this should be resolved. Please enter a acpi bug into
bugzilla.kernel.org with sufficient info : dmesg,lspci -vvx,
/proc/ioports, acpidump output... w/ acpi=off.

On 3/18/07, Johannes Weiner <hannes-kernel@...urebad.de> wrote:
> [resend due to wrong mail headers last time]
>
> Hi,
>
> The kernel version mentioned in the subject won't boot because the ACPI
> system does not get initialized; the system freezes on an outb() in
> acpi_os_write_port() i.e. it does not do anything anymore and just hangs.
>
> Here is the `stack trace' I managed to extract via debugging output:
>
>         -- acpi_os_write_port(0xb2, 240, 8)
>         -- acpi_hw_set_mode(ACPI_SYS_MODE_ACPI)
>         -- acpi_enable()
>         -- acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE)
>         -- acpi_early_init()
>         ...
>
> Notes:
>         * acpi_os_write_port(): I printk'd the arguments; the port
>           formatted with %#x and the value with %u.
>
>         * acpi_enable_subsystem(): I removed ACPI_NO_HARDWARE_INIT
>           from the arguments because it is not used anymore.
>           In this context I want to mention that it probably can be
>           removed from include/acpi/actypes.h generally.
>
> Random question:
>
>         I noticed that acpi_gbl_FADT is declared in
>         include/acpi/acglobal.h but where is it actually defined and
>         initialized?
>
> HTH,
> Hannes
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