From mboxrd@z Thu Jan  1 00:00:00 1970
From: Len Brown <lenb@kernel.org>
Subject: Re: ACPI Error (utglobal-0126)
Date: Tue, 15 Jan 2008 11:57:22 -0500
Message-ID: <200801151157.22272.lenb@kernel.org>
References: <b43bf5490801150510v55ddb2feq3be947536c4c28c5@mail.gmail.com>
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To: Erwan Velu <erwanaliasr1@gmail.com>, "Zhang, Rui" <rui.zhang@intel.com>
Cc: linux-acpi@vger.kernel.org

On Tuesday 15 January 2008 08:10, Erwan Velu wrote:
> Hey folks,
> 
> I'm running a 2.6.24-rc7 on my Samsung R70 in 64bit mode.
> While booting up, the ACPI shows me this error :
> 
> ACPI Error (utglobal-0126): Unknown exception code: 0xFFFFFFFE [20070126]
> Pid: 1950, comm: modprobe Not tainted 2.6.24-laptop-0.rc7.1mdv #1
> 
> Call Trace:
>  [<ffffffff8038bd86>] acpi_ut_update_ref_count+0x50/0x9d
>  [<ffffffff8038c231>] acpi_format_exception+0x2c/0x35
>  [<ffffffff8038afcb>] acpi_ut_exception+0x25/0x8c
>  [<ffffffff8037662c>] acpi_evaluate_integer+0xb6/0xc7
>  [<ffffffff8821dd0a>] :video:acpi_video_bus_add+0xcc9/0xce2
>  [<ffffffff802c45e8>] ifind+0x58/0xd0
>  [<ffffffff8038f33c>] acpi_device_probe+0x43/0x91
>  [<ffffffff803c31cc>] driver_probe_device+0x9c/0x1b0
>  [<ffffffff803c3499>] __driver_attach+0xc9/0xd0
>  [<ffffffff803c33d0>] __driver_attach+0x0/0xd0
>  [<ffffffff803c23ad>] bus_for_each_dev+0x4d/0x80
>  [<ffffffff803c281c>] bus_add_driver+0xac/0x220
>  [<ffffffff8822303c>] :video:acpi_video_init+0x3c/0x5e
>  [<ffffffff802622ae>] sys_init_module+0x18e/0x19a0
>  [<ffffffff802522b0>] autoremove_wake_function+0x0/0x30
>  [<ffffffff8020c34e>] system_call+0x7e/0x83
> 
> ACPI Exception (video-1721): UNKNOWN_STATUS_CODE, Cant attach device [20070126]
> input: Video Bus as /class/input/input7
> 
> I would love helping you in fixing that.
> How Can I Help ?

you just did:-)

Rui,
acpi_video_bus_get_one_device() is returning -errno style status,
but acpi_video_bus_get_devices() is expecting an ACPICA style status

                status = acpi_video_bus_get_one_device(dev, video);
                if (ACPI_FAILURE(status)) {
                        ACPI_EXCEPTION((AE_INFO, status, "Cant attach device"));
                        continue;
                }

looks like this was true in 2.6.23 as well...

-Len