screen-gamma not always effective?

[Phil Rooke]

I tried:

$ emacs -Q -fg white -bg darkblue

(the colours simply make the effect more obvious on my laptop)

then evaluate in a *scratch* buffer:

(modify-all-frames-parameters '((screen-gamma . 1.5)))

then create a new frame with C-x 5 2

What I see is that any part of the new frame containing text seems to
show what looks, to me, to be the now correct colour.  Any part of the
new frame which has yet to be "written on", shows the original, too
bright, colour.


In GNU Emacs 22.0.92.1 (i686-pc-linux-gnu, GTK+ Version 2.10.6)
 of 2007-01-21 on stinkypete
X server distributor `The X.Org Foundation', version 11.0.70101000
configured using `configure '--prefix=/usr' '--host=i686-pc-linux-gnu' 
'--mandir=/usr/share/man' '--infodir=/usr/share/info' '--datadir=/usr/share' 
'--sysconfdir=/etc' '--localstatedir=/var/lib' 
'--program-suffix=.emacs-22.0.92' '--without-carbon' '--with-x' '--with-xpm' 
'--without-toolkit-scroll-bars' '--with-jpeg' '--with-tiff' '--with-gif' 
'--with-png' '--with-x-toolkit=gtk' '--build=i686-pc-linux-gnu' 'CFLAGS=-O2' 
'build_alias=i686-pc-linux-gnu' 'host_alias=i686-pc-linux-gnu''

Important settings:
  value of $LC_ALL: en_GB.UTF-8
  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: en_GB.UTF-8
  locale-coding-system: utf-8
  default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  line-number-mode: t

Recent input:
( m o d i f y - a l l - f r a m e s - p a r a m e t 
e r s SPC ' ( ( s c r e e n - g a m m a SPC . SPC 1 
. 5 ) ) ) C-j C-x 5 2 <switch-frame> <return> <return> 
<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:
Warning: no fonts matching `-*-fixed-medium-r-normal-*-16-*-*-*-*-*-iso8859-1' 
available [2 times]
Warning: no fonts matching `-*-*-medium-r-normal-*-16-*-*-*-*-*-iso8859-1' 
available
Warning: no fonts matching `-*-*-*-r-normal-*-16-*-*-*-*-*-iso8859-1' available
Warning: no fonts matching `-*-*-*-*-normal-*-16-*-*-*-*-*-iso8859-1' available
Warning: no fonts matching `-*-*-*-*-*-*-16-*-*-*-*-*-iso8859-1' available [2 
times]
(emacs -Q)
For information about the GNU Project and its goals, type C-h C-p.
Loading emacsbug...
Loading regexp-opt...done
Loading emacsbug...done