ACPI video: dmi check for broken _BQC on Acer Aspire 5720
On Acer Aspire 5720, _BQC always returns a value 9 smaller than the actual brightness level. Add dmi quirk for this laptop. http://bugzilla.kernel.org/show_bug.cgi?id=13121Tested-by: NMaxim Levitsky <maximlevitsky@gmail.com> Signed-off-by: NZhang Rui <rui.zhang@intel.com> Signed-off-by: NLen Brown <len.brown@intel.com>
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