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Subject: [Bug 198551] MFC 270516 to fix brightness adjustment on many systems
Date: Fri, 13 Mar 2015 18:38:47 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=198551

--- Comment #1 from commit-hook@freebsd.org ---
A commit references this bug:

Author: jhb
Date: Fri Mar 13 18:38:04 UTC 2015
New revision: 279961
URL: https://svnweb.freebsd.org/changeset/base/279961

Log:
  MFC 270516:
  i915 driver - enable opregion handle; program CADL.

  add opregion handling for drm2 - which exposes some ACPI video configuration
  pieces that some Lenovo laptop models use to flesh out which video device
  to speak to.  This enables the brightness control in ACPI to work these
models.

  The CADL bits are also important - it's used to figure out which ACPI
  events to hook the brightness buttons into.  It doesn't yet seem to work
  for me, but it does for the OP.

  PR:        190186, 198551
  Submitted by:    Henry Hu <henry.hu.sh@gmail.com>

Changes:
_U  stable/10/
  stable/10/sys/dev/drm2/i915/i915_drv.h
  stable/10/sys/dev/drm2/i915/i915_irq.c
  stable/10/sys/dev/drm2/i915/intel_opregion.c

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