diff --git a/api/graphics2_unix.C b/api/graphics2_unix.C
index 3c65ef096d..64f2b8efff 100644
--- a/api/graphics2_unix.C
+++ b/api/graphics2_unix.C
@@ -54,15 +54,20 @@ static bool need_show = false;
 
 bool fullscreen;
 
-void boinc_close_window_and_quit() {
+void boinc_close_window_and_quit(const char* p) {
+    fprintf(stderr, "Quitting: %s\n", p);
     exit(0);
 }
 
+void boinc_close_window_and_quit_aux() {
+    boinc_close_window_and_quit("GLUT close");
+}
+
 // This callback is invoked when a user presses a key.
 //
 void keyboardD(unsigned char key, int /*x*/, int /*y*/) {
     if (fullscreen) {
-        boinc_close_window_and_quit();
+        boinc_close_window_and_quit("key down");
     } else {
         boinc_app_key_press((int) key, 0);
     }
@@ -70,7 +75,7 @@ void keyboardD(unsigned char key, int /*x*/, int /*y*/) {
 
 void keyboardU(unsigned char key, int /*x*/, int /*y*/) {
     if (fullscreen) {
-        boinc_close_window_and_quit();
+        boinc_close_window_and_quit("key up");
     } else {
         boinc_app_key_release((int) key, 0);
     }
@@ -79,7 +84,7 @@ void keyboardU(unsigned char key, int /*x*/, int /*y*/) {
 void mouse_click(int button, int state, int x, int y){
     clicked_button = button;
     if (fullscreen) {
-        boinc_close_window_and_quit();
+        boinc_close_window_and_quit("mouse click");
     } else {
         if (state) {
             boinc_app_mouse_button(x, y, button, false);
@@ -91,7 +96,7 @@ void mouse_click(int button, int state, int x, int y){
 
 void mouse_click_move(int x, int y){
     if (fullscreen) {
-        boinc_close_window_and_quit();
+        boinc_close_window_and_quit("mouse move");
     } else if (clicked_button == 2){
         boinc_app_mouse_move(x, y, false, false, true);
     } else if (clicked_button == 1){
@@ -164,7 +169,7 @@ static void make_window() {
     app_graphics_init();
   
 #ifdef __APPLE__
-    glutWMCloseFunc(boinc_close_window_and_quit);   // Enable the window's close box
+    glutWMCloseFunc(boinc_close_window_and_quit_aux);   // Enable the window's close box
     BringAppToFront();
     // Show window only after a successful call to throttled_app_render(); 
     // this avoids momentary display of old image when screensaver restarts 
@@ -204,7 +209,7 @@ static void timer_handler(int) {
         checkparentcounter = 500 / TIMER_INTERVAL_MSEC;
         if (getppid() == 1) {
             // Quit graphics application if parent process no longer running
-            boinc_close_window_and_quit();
+            boinc_close_window_and_quit("parent dead");
         }
     }
     glutTimerFunc(TIMER_INTERVAL_MSEC, timer_handler, 0);
diff --git a/checkin_notes b/checkin_notes
index 26f1e30496..64e25b22a3 100644
--- a/checkin_notes
+++ b/checkin_notes
@@ -5990,4 +5990,5 @@ David  27 July 2008
 
     api/
 	    graphics2.h
+		graphics2_unix.C
 		graphics2_win.C