http://bugzilla.kernel.org/show_bug.cgi?id=11753
------- Comment #14 from [EMAIL PROTECTED] 2008-10-26 22:48 -------
Thanks for the acpidump info.
From the acpidump info it seems that there exists two ACPI video devices on
the laptop. One is intel integrated vidoe(GFX0) and another is external Nvidia
video device. There is no _BCL/_BCM object understand the scope of GFX0. If the
GFX0 ACPI video device is used, the brightness can't be changed by ACPI video
interface. If the nvidia ACPI device is used, the brightness can be changed by
ACPI video interface.
Will you please confirm which graphics device is used?
At the same time it is described in comment #8 that the system will be
rebooted by cat /proc/acpi/video/NVID/LCD/state.
Will you please try the following test and see whether the system will be
rebooted?
a. cat /proc/acpi/video/NVID/CRT1/state
b. cat /proc/acpi/video/NVID/TV/state
If the system is still rebooted, IMO the crash is related with the BIOS.
When catting /proc/acpi/video/NVID/LCD/state the _DCS object will be
evaluated, in which the SMI operation is executed.
>Device (LCD) {
> Name (_ADR, 0x0110)
> Method (_DCS, 0, NotSerialized)
{
> STRP (0x30, One) //SMI operation
Thanks.
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