with two-headed screen, ediff hangs x-create-frame

with two-headed screen, ediff hangs x-create-frame

[Larry Smith]

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In GNU Emacs 21.3.1 (sparc-sun-solaris2.8, X toolkit)
 of 2003-07-30 on lucern
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:


I am running under CDE on Solaris. My desk has two CRT's that are
configured to work as one screen. I.e., I ran 
   /opt/SUNWut/bin/utxconfig -x on
to enable this configuration.

If I run ediff, emacs hangs so thoroughly that I have to kill it from
a different terminal.

If I run with the two CRT's configured to work independently 
(/opt/SUNWut/bin/utxconfig -x off), then it works properly.

The command make-frame-command (C-x 5 2) works properly with either
configuration. 

I traced the problem down to the function x-create-frame-with-faces in
faces.el. when called from ediff, the call to x-create-frame never
returns.

I have a workaround. I added the following to the end of my .emacs. 
Apparently forcing the initial position of the frame to be on-screen
makes x-create-frame happy.

;; On a wide, two-headed screen, the default values cause 
;; make-frame (x-create-frame) to hang.
(require 'ediff)
(setq ediff-control-frame-parameters
  (append '( (top . 100) (left . 100))
          ediff-control-frame-parameters))



Recent input:
<mouse-movement> <mouse-movement> <mouse-movement> 
<mouse-movement> <mouse-movement> <mouse-movement> 
<mouse-movement> <mouse-movement> <mouse-movement> 
<mouse-movement> <mouse-movement> <mouse-movement> 
<mouse-movement> <mouse-movement> <mouse-movement> 
<mouse-movement> <mouse-movement> <mouse-movement> 
<mouse-movement> <mouse-movement> <mouse-movement> 
<mouse-movement> <mouse-movement> <mouse-movement> 
<mouse-movement> <mouse-movement> <mouse-movement> 
<mouse-movement> <mouse-movement> <mouse-movement> 
<mouse-movement> <mouse-movement> <mouse-movement> 
<mouse-movement> <mouse-movement> <mouse-movement> 
<mouse-movement> <mouse-movement> <mouse-movement> 
<mouse-movement> <mouse-movement> <mouse-movement> 
<mouse-movement> <mouse-movement> <mouse-movement> 
<drag-mouse-1> M-w C-x C-b C-n SPC C-y C-j C-x C-f 
x 1 <return> C-x C-f x 2 <return> M-x e d i f f SPC 
b u f f e r <return> <return> <return> SPC SPC q y 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <menu-bar> 
<help-menu> <report-emacs-bug>

Recent messages:
Mark set
x2 has auto save data; consider M-x recover-file
Computing differences between x212779Fv5 and x112779sjC ...

Buffer A: Processing difference region 0 of 1
Buffer B: Processing difference region 0 of 1
Processing difference regions ... done
Refining difference region 1 ...
 [5 times]
Loading emacsbug...done