ACPI video: introduce module parameter video.use_bios_initial_backlight
Introduce module parameter video.use_bios_initial_backlight.
Some BIOSes claim they use the minimum backlight at boot,
and this may bring dimming screen after boot.
https://bugzilla.kernel.org/show_bug.cgi?id=21212
use video.use_bios_initl_backlight=0 to use
the maximum backlight level after boot.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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