linux-kernel - Re: [2.6.39] drm/i915: blank screen on Lenovo Ideapad U160

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Message-ID: <20110616094030.15714852@jbarnes-desktop>
Date:	Thu, 16 Jun 2011 09:40:30 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Dirk Gouders <gouders@...bocholt.fh-gelsenkirchen.de>
Cc:	linux-kernel@...r.kernel.org,
	Chris Wilson <chris@...is-wilson.co.uk>
Subject: Re: [2.6.39] drm/i915: blank screen on Lenovo Ideapad U160

On Thu, 16 Jun 2011 13:49:11 +0200
Dirk Gouders <gouders@...bocholt.fh-gelsenkirchen.de> wrote:

> Some redundant information, but if I change one line at another place
> in the i915 code (whithout the above modification) the result is more
> satisfactory on my machine, because in that case the display even works
> after I close and reopen the lid:
> 
> diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
> index 927442a..ebb67ae 100644
> --- a/drivers/gpu/drm/i915/intel_bios.c
> +++ b/drivers/gpu/drm/i915/intel_bios.c
> @@ -267,7 +267,7 @@ static int intel_bios_ssc_frequency(struct drm_device *dev,
>         case 4:
>                 return alternate ? 100 : 96;
>         default:
> -               return alternate ? 100 : 120;
> +               return alternate ? 120 : 100;
>         }
>  }

Does your machine also work if you set the lvds_use_ssc param to 0?

-- 
Jesse Barnes, Intel Open Source Technology Center
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