1 files changed, 38 insertions, 1 deletions

diff --git a/src/xdisp.c b/src/xdisp.c
index ba7bfad414c..6387d6d341f 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -10365,7 +10365,44 @@ redisplay_window (window, just_this_one_p)
         }
 
       if (!make_cursor_line_fully_visible (w))
-        goto try_to_scroll;
+        {
+          /* CVS rev. 1.761 had changed this to ``goto try_to_scroll''.
+
+             The intention of the fix -- AFAIU -- was to ensure that 
+             the cursor didn't end up on a partially visible last (or
+             first?) line when scrolling.
+
+
+             But that change causes havoc when scrolling backwards and
+             a partially visible first (or last?) line is present when
+             we reach the top of the buffer.  In effect, the text
+             already in the window is repeated (each line is appended
+             to the same or another lines in the window)...
+
+             I changed it back to ``goto need_larger_matrices'' which
+             in effect mean that we don't go through `try_scrolling'
+             when the cursor is already at the first line of the buffer,
+             and there is really only a few pixels [rather than lines]
+             to scroll backwards.  I guess move_it_by_lines etc. really
+             isn't the right device for doing that, ref. the code in
+             make_cursor_line_fully_visible which was also disabled by
+             CVS rev. 1.761.
+
+             But how do we know that we are already on the top line of
+             the window showing the first line in the buffer, so that
+             scrolling really wont help here?
+
+             I cannot find a simple fix for this (I tried various
+             approaches), but I prefer to an occasional partial line
+             rather than the visual messup, so I reverted this part of
+             the fix.
+
+             Someone will need to look into this when time allows.
+
+             -- 2002-08-22, Kim F. Storm  */
+
+          goto need_larger_matrices;
+        }
 #if GLYPH_DEBUG
       debug_method_add (w, "forced window start");
 #endif