Return-Path: <linux-kernel-owner+willy=40w.ods.org@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id <S261495AbTBEPl4>; Wed, 5 Feb 2003 10:41:56 -0500
Received: (majordomo@vger.kernel.org) by vger.kernel.org
	id <S261518AbTBEPl4>; Wed, 5 Feb 2003 10:41:56 -0500
Received: from caramon.arm.linux.org.uk ([212.18.232.186]:49678 "EHLO
	caramon.arm.linux.org.uk") by vger.kernel.org with ESMTP
	id <S261495AbTBEPlz>; Wed, 5 Feb 2003 10:41:55 -0500
Date: Wed, 5 Feb 2003 15:51:27 +0000
From: Russell King <rmk@arm.linux.org.uk>
To: Linux Kernel List <linux-kernel@vger.kernel.org>,
       Linux Fbdev development list 
	<linux-fbdev-devel@lists.sourceforge.net>,
       James Simmons <jsimmons@infradead.org>
Subject: Re: fbcon scrolling madness + fbset corruption
Message-ID: <20030205155127.B28758@flint.arm.linux.org.uk>
Mail-Followup-To: Linux Kernel List <linux-kernel@vger.kernel.org>,
	Linux Fbdev development list <linux-fbdev-devel@lists.sourceforge.net>,
	James Simmons <jsimmons@infradead.org>
References: <20030119200340.A13758@flint.arm.linux.org.uk> <1043026112.988.4.camel@localhost.localdomain> <20030202195744.C32007@flint.arm.linux.org.uk>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.2.5.1i
In-Reply-To: <20030202195744.C32007@flint.arm.linux.org.uk>; from rmk@arm.linux.org.uk on Sun, Feb 02, 2003 at 07:57:44PM +0000
Sender: linux-kernel-owner@vger.kernel.org
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 1775
Lines: 60

No one's commented on this yet.

James?

On Sun, Feb 02, 2003 at 07:57:44PM +0000, Russell King wrote:
> This doesn't appear to solve the ywrap problem - I still get
> places where the screen doesn't scroll.  I decided to write a
> small program to dump out the contents of fb_var_screeninfo, and
> where stuff goes horribly wrong:
> 
> bash-2.04# ./tst
> Visible: 1280x1024
> Virtual: 1280x1632
> BPP    : 8
> Offset : +0+2352
> bash-2.04# ./tst
> Visible: 1280x1024
> Virtual: 1280x1632
> BPP    : 8
> Offset : +0+2392
> 
> Up to the point where it goes wrong:
> 
> bash-2.04# ./tst
> Visible: 1280x1024
> Virtual: 1280x1632
> BPP    : 8
> Offset : +0+528
> bash-2.04# ./tst
> Visible: 1280x1024
> Virtual: 1280x1632
> BPP    : 8
> Offset : +0+568
> bash-2.04# ./tst
> Visible: 1280x1024	<--- this is the last line on the screen
> Virtual: 1280x1632
> BPP    : 8
> Offset : +0+608
> bash-2.04#
> 
> So it looks like something isn't limiting the yoffset in the generic
> console layer; an xoffset of 2392 when the maximum virtual Y is 1632
> is just nonsense.
> 
> I also noticed an additional problem with fbcon: if I change the
> resolution using fbset, the change occurs, except I end up with
> corrupted mess on the screen (the reminents of the original display.)
> The shell prompt is nowhere to be seen.
> 
> Hitting ^L clears the screen and then the shell prompt is visiable.

-- 
Russell King (rmk@arm.linux.org.uk)                The developer of ARM Linux
             http://www.arm.linux.org.uk/personal/aboutme.html

-
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/