[Intel-gfx] [PATCH] ACPI / video: Use native backlight control interface by default

[Matthew Garrett]

We had problems with the Intel backlight driver the last time we tried 
this, so let's push this through their tree for testing first? Cc:ed 
intel-gfx and Daniel Vetter.


On Thu, Dec 05, 2013 at 10:03:57AM +0800, AceLan Kao wrote:
> The native/vendor backlight control interface is hardly fail to control the
> brightness, and we had encountered many backlight issues result from the broken
> ACPI backlight interface, so I think we should promote the native backlight
> control interface and use it by default.
> 
> Signed-off-by: AceLan Kao <acelan.kao at canonical.com>
> ---
>  drivers/acpi/video.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
> index 995e91b..b3032f8 100644
> --- a/drivers/acpi/video.c
> +++ b/drivers/acpi/video.c
> @@ -85,7 +85,7 @@ module_param(allow_duplicates, bool, 0644);
>   * For Windows 8 systems: if set ture and the GPU driver has
>   * registered a backlight interface, skip registering ACPI video's.
>   */
> -static bool use_native_backlight = false;
> +static bool use_native_backlight = true;
>  module_param(use_native_backlight, bool, 0644);
>  
>  static int register_count;
> -- 
> 1.8.3.2
> 
> 
-- 
Matthew Garrett | mjg59 at srcf.ucam.org