2 files changed, 12 insertions, 8 deletions
diff --git a/src/nativewindow/classes/com/jogamp/nativewindow/impl/x11/X11Util.java b/src/nativewindow/classes/com/jogamp/nativewindow/impl/x11/X11Util.java
index c449d8f86..f7f4828ca 100644
--- a/src/nativewindow/classes/com/jogamp/nativewindow/impl/x11/X11Util.java
+++ b/src/nativewindow/classes/com/jogamp/nativewindow/impl/x11/X11Util.java
@@ -77,11 +77,11 @@ public class X11Util {
         }
     }
 
-    public static void setX11ErrorHandler(boolean onoff) {
+    public static void setX11ErrorHandler(boolean onoff, boolean quiet) {
         synchronized(setX11ErrorHandlerLock) {
             if(onoff) {
                 if(0==setX11ErrorHandlerRecCount) {
-                    setX11ErrorHandler0(true);
+                    setX11ErrorHandler0(true, quiet);
                 }
                 setX11ErrorHandlerRecCount++;
             } else {
@@ -90,7 +90,7 @@ public class X11Util {
                 }
                 setX11ErrorHandlerRecCount--;
                 if(0==setX11ErrorHandlerRecCount) {
-                    setX11ErrorHandler0(false);
+                    setX11ErrorHandler0(false, false);
                 }
             }
         }
@@ -595,5 +595,5 @@ public class X11Util {
     }
 
     private static native void initialize0(boolean firstUIActionOnProcess);
-    private static native void setX11ErrorHandler0(boolean onoff);
+    private static native void setX11ErrorHandler0(boolean onoff, boolean quiet);
 }
diff --git a/src/nativewindow/native/x11/Xmisc.c b/src/nativewindow/native/x11/Xmisc.c
index 290ec14cf..0e91ae831 100644
--- a/src/nativewindow/native/x11/Xmisc.c
+++ b/src/nativewindow/native/x11/Xmisc.c
@@ -182,10 +182,13 @@ static void _throwNewRuntimeException(Display * unlockDisplay, JNIEnv *env, cons
 static JNIEnv * x11ErrorHandlerJNIEnv = NULL;
 static XErrorHandler origErrorHandler = NULL ;
 static int errorHandlerBlocked = 0 ;
+static int errorHandlerQuiet = 0 ;
 
 static int x11ErrorHandler(Display *dpy, XErrorEvent *e)
 {
-    fprintf(stderr, "Info: Nativewindow X11 Error: Display %p, Code 0x%X, errno %s", dpy, e->error_code, strerror(errno));
+    if(!errorHandlerQuiet) {
+        fprintf(stderr, "Info: Nativewindow X11 Error: Display %p, Code 0x%X, errno %s\n", dpy, e->error_code, strerror(errno));
+    }
 #if 0
     // Since the X11 Error may happen anytime, a exception could mess up the JVM completely.
     // Experienced this for remote displays issuing non supported commands, eg. glXCreateContextAttribsARB(..)
@@ -225,10 +228,11 @@ static void x11ErrorHandlerEnable(Display *dpy, int onoff, JNIEnv * env) {
     }
 }
 
-static void x11ErrorHandlerEnableBlocking(int onoff, JNIEnv * env) {
+static void x11ErrorHandlerEnableBlocking(JNIEnv * env, int onoff, int quiet) {
     errorHandlerBlocked = 0 ;
     x11ErrorHandlerEnable(NULL, onoff, env);
     errorHandlerBlocked = onoff ;
+    errorHandlerQuiet = quiet;
 }
 
 
@@ -278,8 +282,8 @@ Java_com_jogamp_nativewindow_impl_x11_X11Util_initialize0(JNIEnv *env, jclass _u
 }
 
 JNIEXPORT void JNICALL 
-Java_com_jogamp_nativewindow_impl_x11_X11Util_setX11ErrorHandler0(JNIEnv *env, jclass _unused, jboolean onoff) {
-  x11ErrorHandlerEnableBlocking(( JNI_TRUE == onoff ) ? 1 : 0, env);
+Java_com_jogamp_nativewindow_impl_x11_X11Util_setX11ErrorHandler0(JNIEnv *env, jclass _unused, jboolean onoff, jboolean quiet) {
+  x11ErrorHandlerEnableBlocking(env, ( JNI_TRUE == onoff ) ? 1 : 0, ( JNI_TRUE == quiet ) ? 1 : 0);
 }
 
 /*   Java->C glue code: