linux-kernel - Re: Regression on GMA965 - display seems to have slow jump changes in brightness

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Message-ID: <20120523064941.GA5062@phenom.ffwll.local>
Date:	Wed, 23 May 2012 08:49:41 +0200
From:	Daniel Vetter <daniel@...ll.ch>
To:	Sean Paul <seanpaul@...omium.org>
Cc:	Zdenek Kabelac <zdenek.kabelac@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	intel-gfx@...ts.freedesktop.org, daniel@...ll.ch,
	jbarnes@...tuousgeek.org
Subject: Re: Regression on GMA965 - display seems to have slow jump changes
 in brightness

On Tue, May 22, 2012 at 06:21:22PM -0400, Sean Paul wrote:
> On Tue, May 22, 2012 at 6:15 PM, Zdenek Kabelac
> <zdenek.kabelac@...il.com> wrote:
> > 2012/5/22 Zdenek Kabelac <zdenek.kabelac@...il.com>:
> > And we have a winner - cec2f356d59d9e070413e5966a3c5a1af136d948
> >
> 
> Hmm, seems like your display doesn't like to be downclocked, or rather
> you don't like it to be downclocked :) The reason this patch triggered
> it is because it does a better job of finding a compatible clock. You
> can disable lvds downclocking on the kernel command line by setting
> i915.lvds_downclock=0

... which is actually the default. Zdenek, are you enabling this option on
your kernel cmdline?
-Daniel
-- 
Daniel Vetter
Mail: daniel@...ll.ch
Mobile: +41 (0)79 365 57 48
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