[Intel-gfx] [RFC PATCH 0/2] i915 brightness control
kamal at canonical.com
Wed Jun 2 15:11:40 PDT 2010
Requesting comments on this idea (proposed by Matthew Garrett) and my
implementation. Note especially the KNOWN PROBLEM with a "GM45" GPU.
In order to avoid the often-dysfunctional native acpi brightness control
methods, a new acpi_brightness_hook interface is made available.
The i915 driver uses the new hook to take over brightness control.
Boot with i915.brightness=0 to disable.
- i915 opregion brightness control silently fails on GM45 (pci-id 0x2a42)
[RFC PATCH 1/2] acpi/video: acpi_brightness_hook API
[RFC PATCH 2/2] drm/i915: override acpi brightness control
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