@@ -294,6 +294,8 @@ 
 	/* Panel */
 	else if (strcmp(key, "panel_monitor") == 0) {
 		panel_config.monitor = config_get_monitor(value);
+	} else if (strcmp(key, "primary_monitor_first") == 0) {
+		primary_monitor_first = atoi(value);
 	} else if (strcmp(key, "panel_size") == 0) {
 		extract_values(value, &value1, &value2, &value3);
 

@@ -31,6 +31,8 @@ #include "window.h"
 
 Server server;
 
+gboolean primary_monitor_first = FALSE;
+
 void server_catch_error(Display *d, XErrorEvent *ev)
 {
 }
@@ -261,6 +263,13 @@ {
 	const Monitor *m1 = (const Monitor *)monitor1;
 	const Monitor *m2 = (const Monitor *)monitor2;
 
+	if (primary_monitor_first) {
+		if (m1->primary && !m2->primary)
+			return 1;
+		if (m2->primary && !m1->primary)
+			return -1;
+	}
+
 	if (m1->x < m2->x) {
 		return -1;
 	} else if (m1->x > m2->x) {
@@ -294,6 +303,7 @@ if (XineramaIsActive(server.dsp)) {
 		int num_monitors;
 		XineramaScreenInfo *info = XineramaQueryScreens(server.dsp, &num_monitors);
 		XRRScreenResources *res = XRRGetScreenResourcesCurrent(server.dsp, server.root_win);
+		RROutput primary_output = XRRGetOutputPrimary(server.dsp, server.root_win);
 
 		if (res && res->ncrtc >= num_monitors) {
 			// use xrandr to identify monitors (does not work with proprietery nvidia drivers)
@@ -323,6 +333,7 @@ XRROutputInfo *output_info = XRRGetOutputInfo(server.dsp, res, crtc_info->outputs[j]);
 					printf("xRandr: Linking output %s with crtc %d\n", output_info->name, i);
 					server.monitors[i].names[j] = g_strdup(output_info->name);
 					XRRFreeOutputInfo(output_info);
+					server.monitors[i].primary = crtc_info->outputs[j] == primary_output;
 				}
 				server.monitors[i].names[crtc_info->noutput] = NULL;
 				XRRFreeCrtcInfo(crtc_info);

@@ -18,6 +18,8 @@ #include <libsn/sn.h>
 #endif
 #include <glib.h>
 
+extern gboolean primary_monitor_first;
+
 typedef struct Global_atom {
 	Atom _XROOTPMAP_ID;
 	Atom _XROOTMAP_ID;
@@ -96,6 +98,7 @@ int x;
 	int y;
 	int width;
 	int height;
+	gboolean primary;
 	gchar **names;
 } Monitor;
 

@@ -37,6 +37,7 @@ GtkWidget *panel_window_name, *disable_transparency;
 GtkWidget *panel_mouse_effects;
 GtkWidget *mouse_hover_icon_opacity, *mouse_hover_icon_saturation, *mouse_hover_icon_brightness;
 GtkWidget *mouse_pressed_icon_opacity, *mouse_pressed_icon_saturation, *mouse_pressed_icon_brightness;
+GtkWidget *panel_primary_monitor_first;
 
 GtkListStore *panel_items, *all_items;
 GtkWidget *panel_items_view, *all_items_view;
@@ -1129,6 +1130,20 @@ gtk_combo_box_append_text(GTK_COMBO_BOX(panel_combo_monitor), _("5"));
 	gtk_combo_box_append_text(GTK_COMBO_BOX(panel_combo_monitor), _("6"));
 	gtk_combo_box_set_active(GTK_COMBO_BOX(panel_combo_monitor), 0);
 	gtk_tooltips_set_tip(tooltips, panel_combo_monitor, _("The monitor on which the panel is placed"), NULL);
+
+	row++;
+	col = 2;
+	label = gtk_label_new(_("Primary monitor first"));
+	gtk_misc_set_alignment(GTK_MISC(label), 0, 0);
+	gtk_widget_show(label);
+	gtk_table_attach(GTK_TABLE(table), label, col, col+1, row, row+1, GTK_FILL, 0, 0, 0);
+	col++;
+
+	panel_primary_monitor_first = gtk_check_button_new();
+	gtk_widget_show(panel_primary_monitor_first);
+	gtk_table_attach(GTK_TABLE(table), panel_primary_monitor_first, col, col+1, row, row+1, GTK_FILL, 0, 0, 0);
+	col++;
+	gtk_tooltips_set_tip(tooltips, panel_primary_monitor_first, _("If enabled, the primary monitor will have index 1 in the monitor list even if it is not top-left."), NULL);
 
 	row++;
 	col = 2;

@@ -17,6 +17,7 @@ extern GtkWidget *panel_window_name, *disable_transparency;
 extern GtkWidget *panel_mouse_effects;
 extern GtkWidget *mouse_hover_icon_opacity, *mouse_hover_icon_saturation, *mouse_hover_icon_brightness;
 extern GtkWidget *mouse_pressed_icon_opacity, *mouse_pressed_icon_saturation, *mouse_pressed_icon_brightness;
+extern GtkWidget *panel_primary_monitor_first;
 
 enum {
 	itemsColName = 0,

@@ -228,6 +228,8 @@ fprintf(fp, "%d", gtk_combo_box_get_active(GTK_COMBO_BOX(panel_combo_monitor)));
 	}
 	fprintf(fp, "\n");
 
+	fprintf(fp, "primary_monitor_first = %d\n", gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(panel_primary_monitor_first)) ? 1 : 0);
+
 	fprintf(fp, "autohide = %d\n", gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(panel_autohide)) ? 1 : 0);
 	fprintf(fp, "autohide_show_timeout = %g\n", gtk_spin_button_get_value(GTK_SPIN_BUTTON(panel_autohide_show_time)));
 	fprintf(fp, "autohide_hide_timeout = %g\n", gtk_spin_button_get_value(GTK_SPIN_BUTTON(panel_autohide_hide_time)));
@@ -1021,6 +1023,9 @@ else if (strcmp(value, "5") == 0)
 			gtk_combo_box_set_active(GTK_COMBO_BOX(panel_combo_monitor), 5);
 		else if (strcmp(value, "6") == 0)
 			gtk_combo_box_set_active(GTK_COMBO_BOX(panel_combo_monitor), 6);
+	}
+	else if (strcmp(key, "primary_monitor_first") == 0) {
+		gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(panel_primary_monitor_first), atoi(value));
 	}
 	
 	/* autohide options */