[Bug 195116] New: Display brightness control/resuming require acpi_video to be loaded after i915kms

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195116

            Bug ID: 195116
           Summary: Display brightness control/resuming require acpi_video
                    to be loaded after i915kms
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: Needs Triage
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: Lutz.Bichler at gmail.com

On an Asus UX31A (Ivybridge) it is required to load the acpi_video module after
the i915kms module to be able to control the brightness
(hw.acpi.video.lcd0.brightness) or to successfully resume the machine. 

Therefore, it is not possible to directly load the acpi_video module at startup
(especially because loading the i915kms module from loader.conf leads to a
black screen on this machine).

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