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    SubjectRe: Regression: i915 blank issue on kernel 3.1.0-rc3
    >From: Alex Davis <alex14641@yahoo.com>
    >To: "terraluna977@gmail.com" <terraluna977@gmail.com>; "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
    >Cc:
    >Sent: Sunday, September 25, 2011 9:37 AM
    >Subject: Re: Regression: i915 blank issue on kernel 3.1.0-rc3
    >
    >I'm having the same problem.
    >
    >http://marc.info/?l=linux-kernel&m=131695739702141&w=2
    >
    >Please keep me on the CC list for this thread.
    >
    >Thanks.
    >
    >
    > I code, therefore I am

    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.

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