Message-Id: <89khjo$fk2k1t@orsmga002.jf.intel.com>
Date: Sun, 06 Jun 2010 08:26:46 +0100
To: Andy Isaacson <adi@hexapodia.org>, linux-kernel@vger.kernel.org,
       Eric Anholt <eric@anholt.net>, dri-devel@lists.sourceforge.net
Subject: Re: [2.6.35-rc regression] i915: cursor corruption on Arrandale caused by 9b8c4a0b215e
References: <20100606022115.GA26686@hexapodia.org>
From: Chris Wilson <chris@chris-wilson.co.uk>
In-Reply-To: <20100606022115.GA26686@hexapodia.org>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1130
Lines: 25

On Sat, 5 Jun 2010 19:21:15 -0700, Andy Isaacson <adi@hexapodia.org> wrote:
> My x201s (Core i7 L640 according to /proc/cpuinfo) running -rc1 exhibits
> cursor corruption when changing the cursor image (such as when moving
> out of xterm onto the desktop).  Bisection pointed to 9b8c4a0b215e and
> reverting that on top of 03cd373981 fixed the problem.  I'm running
> fvwm2 with xterm as my primary X client; the driver is
> 
> xserver-xorg-video-intel             2:2.9.1-4
> 
> The corruption generally goes away within a second or two, and seems to
> consist of the previous cursor image interleaved with the new cursor
> image on a row-by-row basis.  Some kind of cache flush issue?

Exactly; a missing move-to-GTT-domain causing the cursor data to remain in
the CPU cache.

https://bugs.freedesktop.org/show_bug.cgi?id=28335

-- 
Chris Wilson, Intel Open Source Technology Centre
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