Problem with redisplay with latest CVS Emacs

Problem with redisplay with latest CVS Emacs

[Krishnakumar B]

Hi,

When I try to scroll down by pressing C-n till I reach the end of the
page, I get garbage on the screen. It is reproducable every time. It
happens as soon as I go one line past the last line in a window full of
text. I can also reproduce it when moving down using C-v. In this case I
need to keep pressing C-v till I get to the end of the file. Emacs
displays garbage for the last page of any buffer. If I press C-v again, I
get the ding for End of Buffer and normal display is restored.

What I mean by garbage is this:

http://www.cs.wustl.edu/~kitty/emacs-redisplay-bug.png

Is it a known problem ? Any workarounds ? I don't get it in GNU Emacs 21.2.
I am currently using CVS:

GNU Emacs 21.3.50.1 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars) of
2002-08-04 on samba

checked out at 1200 CST.

-kitty

-- 
Krishnakumar B <kitty at cs dot wustl dot edu>
Distributed Object Computing Laboratory, Washington University in St.Louis

Re: Problem with redisplay with latest CVS Emacs

[Karl Eichwalder]

Krishnakumar B <kitty@cs.wustl.edu> writes:

> When I try to scroll down by pressing C-n till I reach the end of the
> page, I get garbage on the screen.

Probably related to (and still present; additional info by my side:
scroll-conservatively does not seem to be involved -- without setting
this variable, the erros still occurs):

-=-=-=-=-=-=-=-=-=-=-=-=-=- cut here -=-=-=-=-=-=-=-=-=-=-=-=-=-
From: Juanma Barranquero <lektu@terra.es>
Subject: Re: display issues / line wrapping
To: Karl Eichwalder <keichwa@gmx.net>
Cc: emacs-devel@gnu.org
Date: Wed, 31 Jul 2002 08:50:26 +0200

On Wed, 31 Jul 2002 06:30:29 +0200, Karl Eichwalder <keichwa@gmx.net> wrote:

> I forgot to mention that I'm using
> 
>     (setq scroll-conservatively 1)

This is a bug already reported several times and apparently related to
partially visible lines and a non-zero `scroll-conservatively'. It seems
to be caused by a change to xdisp.c by Richard on 2002-07-07. I've seen
it happen in W95, W2K and RedHat GNU/Linux 7.2, but I suppose it happens
in all platforms.

See threads:

http://mail.gnu.org/pipermail/emacs-devel/2002-July/010512.html
http://mail.gnu.org/pipermail/emacs-devel/2002-July/010588.html
http://mail.gnu.org/pipermail/emacs-devel/2002-July/010709.html
http://mail.gnu.org/pipermail/emacs-devel/2002-July/010776.html

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