https://bugzilla.kernel.org/show_bug.cgi?id=14216





--- Comment #38 from ykzhao <[email protected]>  2010-09-20 06:49:12 ---
Will you please use the following command and see whether the brightness can be
changed?
    >setpci -s 0:0:02.0 f4.b=0x80
    >setpci -s 0:0:02.0 f4.b=0xF0

Will you please try the following boot option and see whether the brightness
can be changed by using hotkey?
   >acpi_osi!="Linux" acpi_osi!="Windows 2006" acpi_osi!="Windows 2009"

thanks.

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