linux-kernel - Re: Linux 2.6.33-rc4

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Date:	Thu, 14 Jan 2010 22:18:00 +0200
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	Pekka Enberg <penberg@...helsinki.fi>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	airlied@...ux.ie
Subject: Re: Linux 2.6.33-rc4

On Thu, Jan 14, 2010 at 9:31 PM, Nick Bowler <nbowler@...iptictech.com> wrote:
> On 21:15 Thu 14 Jan     , Pekka Enberg wrote:
>> OK, I think I am seeing a different kind of flicker now. It doesn't
>> happen anywhere as often as before (which is probably why I missed it
>> last night). The flicker is more like a flash of some other window
>> whereas the flicker before used to "shake" the screen.
>>
>> Does this ring a bell?
>
> Your symptoms sound identical to mine on my ThinkPad T500 laptop, as
> described in http://bugs.freedesktop.org/show_bug.cgi?id=25809.
>
> This is the patch I am currently applying locally which solves all my
> problems.
>
> diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
> index f4b4aa2..4fb5911 100644
> --- a/drivers/gpu/drm/i915/intel_lvds.c
> +++ b/drivers/gpu/drm/i915/intel_lvds.c
> @@ -914,7 +914,7 @@ static void intel_find_lvds_downclock(struct drm_device *dev,
>        mutex_unlock(&dev->mode_config.mutex);
>        if (temp_downclock < panel_fixed_mode->clock) {
>                /* We found the downclock for LVDS. */
> -               dev_priv->lvds_downclock_avail = 1;
> +               dev_priv->lvds_downclock_avail = 0;
>                dev_priv->lvds_downclock = temp_downclock;
>                DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
>                                "Normal clock %dKhz, downclock %dKhz\n",

Should I try just this or combine it with Jesse's patch?
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