From: "Antonino A. Daplas" <adaplas@hotpop.com>
Reply-To: adaplas@pol.net
To: Paolo Ornati <ornati@fastwebnet.it>, adaplas@pol.net
Subject: Re: 2.6.9-rc1: scrolling with tdfxfb 5 times slower
Date: Thu, 2 Sep 2004 04:20:55 +0800
User-Agent: KMail/1.5.4
Cc: linux-kernel@vger.kernel.org
References: <200408312133.40039.ornati@fastwebnet.it> <200409011851.00777.adaplas@hotpop.com> <200409011355.52999.ornati@fastwebnet.it>
In-Reply-To: <200409011355.52999.ornati@fastwebnet.it>
MIME-Version: 1.0
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
Message-Id: <200409020420.55269.adaplas@hotpop.com>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1056
Lines: 33

On Wednesday 01 September 2004 19:55, Paolo Ornati wrote:
> > Ok, I think I know why the scrolling speed is too slow, the driver is not
> > maximizing the extra memory of the framebuffer.
> >
> > This patch sets info->var.yres_virtual to the maximum upon driver load.
> > If this works, it's possible to get sub-1 second scrolling speed.
> >
> > Reverse the previous patch first, then apply this patch.
>
> Results for 2.6.9-rc1 + your patch (time cat MAINTAINERS):
>
> CONFIG_FB_3DFX_ACCEL=n
> ~1.27 s
>
> CONFIG_FB_3DFX_ACCEL=y
> ~0.18 s
>
> BUT with CONFIG_FB_3DFX_ACCEL enabled I get strange video
> "corruptions" (like bitmaps with random colors) that go away simply
> swithcing to another console and than back to the previous.

And another suggestion:

Try to comment out FBINFO_HWACCEL_COPYAREA.

Tony


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/