Re: display-buffer change

[martin rudalics]

> I have seen a change in Emacs 22.1 from Emacs 21 that broke my use of
> dedicated windows.
>
> The problem is that (display-buffer buf) will change the contents of
> the current window, if the other window in the frame has a dedicated
> buffer.  In Emacs 21, a new window would be opened instead.

[...]

> I use a dedicated small window at the bottom of my frame that always
> contains the *compilation* buffer, and the new behaviour in Emacs 22
> seriously lower the usability of a lots of command, such as viewing
> diffs or showing source from gdb etc.
>
> I didn't find anything in NEWS that indicated that this was somehow
> intentional.
>

Please ignore if this has been already resolved.  You should be able to
handle this by customizing `split-height-threshold' to a reasonable
value (say 10).  Confer the doc-string of `display-buffer':

  If a full-width window on a splittable frame is available to display
  the buffer, it may be split, subject to the value of the variable
  `split-height-threshold'.

I didn't trace what caused the behavior to change from Emacs 21 to Emacs
22.  The Emacs 22 behavior is consistent with respect to the doc-strings
of `split-height-threshold' and `display-buffer' though.