[PATCH 3/3] ACPI / video / i915: No ACPI backlight if firmware expects Windows 8

2013-07-17 Thread Rafael J. Wysocki
From: Rafael J. Wysocki According to Matthew Garrett, "Windows 8 leaves backlight control up to individual graphics drivers rather than making ACPI calls itself. There's plenty of evidence to suggest that the Intel driver for Windows [8] doesn't use the ACPI interface, including the fact that

[PATCH 3/3] ACPI / video / i915: No ACPI backlight if firmware expects Windows 8

2013-07-17 Thread Rafael J. Wysocki
From: Rafael J. Wysocki rafael.j.wyso...@intel.com According to Matthew Garrett, Windows 8 leaves backlight control up to individual graphics drivers rather than making ACPI calls itself. There's plenty of evidence to suggest that the Intel driver for Windows [8] doesn't use the ACPI interface,