[Bug 190186] [patch] i915 driver: enable opregion handling

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=190186

--- Comment #2 from Adrian Chadd <adrian at freebsd.org> ---
It didn't do anything for me. Lenovo Thinkpad X230; Ivy Bridge CPU. But yes,
it's now showing up as lcd0.active=1.

If I set hw.acpi.video.lcd0.brightness to something other than 99, then the
value is taken but the brightness doesn't change. If I use the keyboard to
change the LCD  brightness - up or down - it resets the value to 99.

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