bug#37840: Missing in the Emacs manuals:

[martin rudalics <rudalics@gmx.at>]

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 > That seems unfortunate.  Can we somehow make Speedbar insulated from
 > the switch-to-buffer customizations?

The attached patch should do that.  But there are probably too many
similar cases out there.  Strictly spoken we should check each of our
'switch-to-buffer' calls for whether to

(1) convert it to 'set-window-buffer' (so no customization ever
     affects it),

(2) bind 'switch-to-buffer-obey-display-actions' to nil around it (to
     bow out comme il faut when the window is a minibuffer window or
     dedicated to its buffer),

(3) call 'pop-to-buffer-same-window' instead, or

(4) leave it alone.

martin

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--- a/lisp/dframe.el
+++ b/lisp/dframe.el
@@ -309,8 +309,8 @@ dframe-frame-mode
 	  (make-frame-visible (symbol-value frame-var))
 	  (select-frame (symbol-value frame-var))
 	  (set-window-dedicated-p (selected-window) nil)
-	  (if (not (eq (current-buffer) (symbol-value buffer-var)))
-	      (switch-to-buffer (symbol-value buffer-var)))
+	  (unless (eq (current-buffer) (symbol-value buffer-var))
+	    (set-window-buffer nil (symbol-value buffer-var)))
 	  (set-window-dedicated-p (selected-window) t)
 	  (raise-frame (symbol-value frame-var))
 	  )
@@ -346,7 +346,7 @@ dframe-frame-mode
 	;; Put the buffer into the frame
 	(save-excursion
 	  (select-frame (symbol-value frame-var))
-	  (switch-to-buffer (symbol-value buffer-var))
+	  (set-window-buffer nil (symbol-value buffer-var))
 	  (set-window-dedicated-p (selected-window) t))
 	;; Run hooks (like reposition)
 	(run-hooks create-hook)