https://bugzilla.kernel.org/show_bug.cgi?id=15528





--- Comment #63 from Zhang Rui <rui.zh...@intel.com>  2010-07-13 07:13:27 ---
I'm afraid the answer is no.
By reading the code, I even suspect if win7 follows the ACPI video extension or
not. Maybe the ACPI method is broken but BIOS writers are not care of it,
because windows just do not use it.
We planned to check how windows control the backlight in the near future, but
this may take months.

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