** Changed in: gnome-panel (Ubuntu)
   Importance: Undecided => Low

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https://bugs.launchpad.net/bugs/1083811

Title:
  Duplicated panels using separate x screens

Status in “gnome-panel” package in Ubuntu:
  New

Bug description:
  I'm trying to use separate x screens on nvidia card with 3 monitors.
  I'm expecting one top panel + one bottom panel on each screen, but
  instead i have got all panels on one screen.

  Restarting gnome panel (gnome-panel --replace) it will create two
  extra (blank) panel pairs on same screen, but new applets will be
  added on first panel pair. Screenshot ilustrating problem can be found
  here - http://askubuntu.com/questions/177226/duplicated-menu-panel-
  indicators-and-taskbar

  I tried to manualy set screen key (org->gnome->gnome-
  panel->layout->toplevels->top-panel->screen) on wich screen panel
  should appear with dconf Editor. But restarting gnome-panel that key
  will be reseted.

  Downloaded gnome-panel source code (apt-get source gnome-panel), spend
  some time trying to find problem, and probably i found it in file
  panel-toplevel.c.

  Line 4458: if (!screen || GDK_IS_SCREEN (screen))
  Line 4459: screen = gdk_screen_get_default ();

  These lines are responsible for resetting screen key. It will reset
  screen to default if currenct screen exist, but its not what we want.
  We want reset screen to default if screen dosnt exist, so line 4458
  should be -  if (!screen || !GDK_IS_SCREEN (screen))

  After compiling and installing new package, gnome panel works as
  expected.

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