linux-kernel - Re: Regression: i915 blank issue on kernel 3.1.0-rc3

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Date:	Tue, 04 Oct 2011 12:32:43 -0700
From:	Keith Packard <keithp@...thp.com>
To:	Alex Davis <alex14641@...oo.com>,
	"terraluna977\@gmail.com" <terraluna977@...il.com>,
	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
	Matthew Garrett <mjg@...hat.com>
Subject: Re:  Regression: i915 blank issue on kernel 3.1.0-rc3

On Mon, 3 Oct 2011 14:10:10 -0700 (PDT), Alex Davis <alex14641@...oo.com> wrote:

> The following patch fixed my backlight issues:
> 
> diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
> index a9e0c7b..6f56676 100644
> --- a/drivers/gpu/drm/i915/intel_panel.c
> +++ b/drivers/gpu/drm/i915/intel_panel.c
> @@ -262,8 +262,6 @@ void intel_panel_disable_backlight(struct drm_device *dev)
>          dev_priv->backlight_level = intel_panel_get_backlight(dev);
>          dev_priv->backlight_enabled = false;
>      }
> -
> -    intel_panel_set_backlight(dev, 0);
>  }
>  
>  void intel_panel_enable_backlight(struct drm_device *dev)
> 
> I've been using it since yesterday morning with no issues.

Matthew -- if we cannot resolve this backlight issue, we're going to
need to disable the new backlight code for 3.1. Do you want to try and
fix it? Or should we bail for now?

-- 
keith.packard@...el.com

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