--- a/src/java.desktop/unix/native/libawt_xawt/awt/gtk3_interface.c	Tue Jun 19 10:12:35 2018 -0700
+++ b/src/java.desktop/unix/native/libawt_xawt/awt/gtk3_interface.c	Wed Jun 20 11:12:48 2018 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -547,6 +547,7 @@
 
         fp_g_path_get_dirname = dl_symbol("g_path_get_dirname");
 
+        fp_gdk_threads_init = dl_symbol("gdk_threads_init");
         fp_gdk_threads_enter = dl_symbol("gdk_threads_enter");
         fp_gdk_threads_leave = dl_symbol("gdk_threads_leave");
 
@@ -626,10 +627,16 @@
     AWT_LOCK();
     handler = XSetErrorHandler(NULL);
     io_handler = XSetIOErrorHandler(NULL);
+
+    //According the GTK documentation, gdk_threads_init() should be
+    //called before gtk_init() or gtk_init_check()
+    fp_gdk_threads_init();
     result = (*fp_gtk_init_check)(NULL, NULL);
+
     XSetErrorHandler(handler);
     XSetIOErrorHandler(io_handler);
     AWT_UNLOCK();
+
     /* Initialize widget array. */
     for (i = 0; i < _GTK_WIDGET_TYPE_SIZE; i++)
     {

--- a/test/jdk/ProblemList.txt	Tue Jun 19 10:12:35 2018 -0700
+++ b/test/jdk/ProblemList.txt	Wed Jun 20 11:12:48 2018 -0700
@@ -280,12 +280,12 @@
 java/awt/Modal/FileDialog/FileDialogModal5Test.java 8198664 macosx-all
 java/awt/Modal/FileDialog/FileDialogModal6Test.java 8198664 macosx-all
 java/awt/Modal/FileDialog/FileDialogNonModal1Test.java 8198664 macosx-all
-java/awt/Modal/FileDialog/FileDialogNonModal2Test.java 8198664,8203003 macosx-all,linux-all
+java/awt/Modal/FileDialog/FileDialogNonModal2Test.java 8198664 macosx-all,linux-all
 java/awt/Modal/FileDialog/FileDialogNonModal3Test.java 8198664 macosx-all
 java/awt/Modal/FileDialog/FileDialogNonModal4Test.java 8198664 macosx-all
 java/awt/Modal/FileDialog/FileDialogNonModal5Test.java 8198664 macosx-all
-java/awt/Modal/FileDialog/FileDialogNonModal6Test.java 8198664,8203003 macosx-all,linux-all
-java/awt/Modal/FileDialog/FileDialogNonModal7Test.java 8198664,8203003 macosx-all,linux-all
+java/awt/Modal/FileDialog/FileDialogNonModal6Test.java 8198664 macosx-all,linux-all
+java/awt/Modal/FileDialog/FileDialogNonModal7Test.java 8198664 macosx-all,linux-all
 java/awt/Modal/FileDialog/FileDialogTKModal1Test.java 8196430 generic-all
 java/awt/Modal/FileDialog/FileDialogTKModal2Test.java 8196430 generic-all
 java/awt/Modal/FileDialog/FileDialogTKModal3Test.java 8196430 generic-all
@@ -620,60 +620,60 @@
 sun/security/pkcs11/Cipher/ReinitCipher.java                    8204203 windows-all
 sun/security/pkcs11/Cipher/TestPKCS5PaddingError.java           8204203 windows-all
 sun/security/pkcs11/Cipher/TestRSACipher.java                   8204203 windows-all
-sun/security/pkcs11/Cipher/TestRSACipherWrap.java               8204203 windows-all 
-sun/security/pkcs11/Cipher/TestRawRSACipher.java                8204203 windows-all 
-sun/security/pkcs11/Cipher/TestSymmCiphers.java                 8204203 windows-all 
-sun/security/pkcs11/Cipher/TestSymmCiphersNoPad.java            8204203 windows-all 
-sun/security/pkcs11/KeyAgreement/SupportedDHKeys.java           8204203 windows-all 
-sun/security/pkcs11/KeyAgreement/TestDH.java                    8204203 windows-all 
-sun/security/pkcs11/KeyAgreement/TestInterop.java               8204203 windows-all 
-sun/security/pkcs11/KeyAgreement/TestShort.java                 8204203 windows-all 
-sun/security/pkcs11/KeyAgreement/UnsupportedDHKeys.java         8204203 windows-all 
-sun/security/pkcs11/KeyGenerator/DESParity.java                 8204203 windows-all 
-sun/security/pkcs11/KeyGenerator/TestKeyGenerator.java          8204203 windows-all 
-sun/security/pkcs11/KeyPairGenerator/TestDH2048.java            8204203 windows-all 
-sun/security/pkcs11/KeyStore/SecretKeysBasic.sh                 8204203 windows-all 
-sun/security/pkcs11/Mac/MacKAT.java                             8204203 windows-all 
-sun/security/pkcs11/Mac/MacSameTest.java                        8204203 windows-all 
-sun/security/pkcs11/Mac/ReinitMac.java                          8204203 windows-all 
-sun/security/pkcs11/MessageDigest/ByteBuffers.java              8204203 windows-all 
-sun/security/pkcs11/MessageDigest/DigestKAT.java                8204203 windows-all 
-sun/security/pkcs11/MessageDigest/ReinitDigest.java             8204203 windows-all 
-sun/security/pkcs11/MessageDigest/TestCloning.java              8204203 windows-all 
-sun/security/pkcs11/Provider/ConfigQuotedString.sh              8204203 windows-all 
-sun/security/pkcs11/Provider/Login.sh                           8204203 windows-all 
-sun/security/pkcs11/SampleTest.java                             8204203 windows-all 
-sun/security/pkcs11/Secmod/AddPrivateKey.java                   8204203 windows-all 
-sun/security/pkcs11/Secmod/Crypto.java                          8204203 windows-all 
-sun/security/pkcs11/Secmod/GetPrivateKey.java                   8204203 windows-all 
-sun/security/pkcs11/Secmod/JksSetPrivateKey.java                8204203 windows-all 
-sun/security/pkcs11/Secmod/LoadKeystore.java                    8204203 windows-all 
-sun/security/pkcs11/Secmod/TestNssDbSqlite.java                 8204203 windows-all 
-sun/security/pkcs11/SecureRandom/Basic.java                     8204203 windows-all 
-sun/security/pkcs11/SecureRandom/TestDeserialization.java       8204203 windows-all 
-sun/security/pkcs11/Serialize/SerializeProvider.java            8204203 windows-all 
-sun/security/pkcs11/Signature/ByteBuffers.java                  8204203 windows-all 
-sun/security/pkcs11/Signature/ReinitSignature.java              8204203 windows-all 
-sun/security/pkcs11/Signature/TestDSA.java                      8204203 windows-all 
-sun/security/pkcs11/Signature/TestDSAKeyLength.java             8204203 windows-all 
-sun/security/pkcs11/Signature/TestRSAKeyLength.java             8204203 windows-all 
-sun/security/pkcs11/ec/ReadCertificates.java                    8204203 windows-all 
-sun/security/pkcs11/ec/ReadPKCS12.java                          8204203 windows-all 
-sun/security/pkcs11/ec/TestCurves.java                          8204203 windows-all 
-sun/security/pkcs11/ec/TestECDH.java                            8204203 windows-all 
-sun/security/pkcs11/ec/TestECDH2.java                           8204203 windows-all 
-sun/security/pkcs11/ec/TestECDSA.java                           8204203 windows-all 
-sun/security/pkcs11/ec/TestECDSA2.java                          8204203 windows-all 
-sun/security/pkcs11/ec/TestECGenSpec.java                       8204203 windows-all 
-sun/security/pkcs11/rsa/KeyWrap.java                            8204203 windows-all 
-sun/security/pkcs11/rsa/TestCACerts.java                        8204203 windows-all 
-sun/security/pkcs11/rsa/TestKeyFactory.java                     8204203 windows-all 
-sun/security/pkcs11/rsa/TestKeyPairGenerator.java               8204203 windows-all 
-sun/security/pkcs11/rsa/TestSignatures.java                     8204203 windows-all 
-sun/security/pkcs11/sslecc/ClientJSSEServerJSSE.java            8204203 windows-all 
-sun/security/pkcs11/tls/TestLeadingZeroesP11.java               8204203 windows-all 
-sun/security/pkcs11/tls/TestMasterSecret.java                   8204203 windows-all 
-sun/security/pkcs11/tls/TestPRF.java                            8204203 windows-all 
+sun/security/pkcs11/Cipher/TestRSACipherWrap.java               8204203 windows-all
+sun/security/pkcs11/Cipher/TestRawRSACipher.java                8204203 windows-all
+sun/security/pkcs11/Cipher/TestSymmCiphers.java                 8204203 windows-all
+sun/security/pkcs11/Cipher/TestSymmCiphersNoPad.java            8204203 windows-all
+sun/security/pkcs11/KeyAgreement/SupportedDHKeys.java           8204203 windows-all
+sun/security/pkcs11/KeyAgreement/TestDH.java                    8204203 windows-all
+sun/security/pkcs11/KeyAgreement/TestInterop.java               8204203 windows-all
+sun/security/pkcs11/KeyAgreement/TestShort.java                 8204203 windows-all
+sun/security/pkcs11/KeyAgreement/UnsupportedDHKeys.java         8204203 windows-all
+sun/security/pkcs11/KeyGenerator/DESParity.java                 8204203 windows-all
+sun/security/pkcs11/KeyGenerator/TestKeyGenerator.java          8204203 windows-all
+sun/security/pkcs11/KeyPairGenerator/TestDH2048.java            8204203 windows-all
+sun/security/pkcs11/KeyStore/SecretKeysBasic.sh                 8204203 windows-all
+sun/security/pkcs11/Mac/MacKAT.java                             8204203 windows-all
+sun/security/pkcs11/Mac/MacSameTest.java                        8204203 windows-all
+sun/security/pkcs11/Mac/ReinitMac.java                          8204203 windows-all
+sun/security/pkcs11/MessageDigest/ByteBuffers.java              8204203 windows-all
+sun/security/pkcs11/MessageDigest/DigestKAT.java                8204203 windows-all
+sun/security/pkcs11/MessageDigest/ReinitDigest.java             8204203 windows-all
+sun/security/pkcs11/MessageDigest/TestCloning.java              8204203 windows-all
+sun/security/pkcs11/Provider/ConfigQuotedString.sh              8204203 windows-all
+sun/security/pkcs11/Provider/Login.sh                           8204203 windows-all
+sun/security/pkcs11/SampleTest.java                             8204203 windows-all
+sun/security/pkcs11/Secmod/AddPrivateKey.java                   8204203 windows-all
+sun/security/pkcs11/Secmod/Crypto.java                          8204203 windows-all
+sun/security/pkcs11/Secmod/GetPrivateKey.java                   8204203 windows-all
+sun/security/pkcs11/Secmod/JksSetPrivateKey.java                8204203 windows-all
+sun/security/pkcs11/Secmod/LoadKeystore.java                    8204203 windows-all
+sun/security/pkcs11/Secmod/TestNssDbSqlite.java                 8204203 windows-all
+sun/security/pkcs11/SecureRandom/Basic.java                     8204203 windows-all
+sun/security/pkcs11/SecureRandom/TestDeserialization.java       8204203 windows-all
+sun/security/pkcs11/Serialize/SerializeProvider.java            8204203 windows-all
+sun/security/pkcs11/Signature/ByteBuffers.java                  8204203 windows-all
+sun/security/pkcs11/Signature/ReinitSignature.java              8204203 windows-all
+sun/security/pkcs11/Signature/TestDSA.java                      8204203 windows-all
+sun/security/pkcs11/Signature/TestDSAKeyLength.java             8204203 windows-all
+sun/security/pkcs11/Signature/TestRSAKeyLength.java             8204203 windows-all
+sun/security/pkcs11/ec/ReadCertificates.java                    8204203 windows-all
+sun/security/pkcs11/ec/ReadPKCS12.java                          8204203 windows-all
+sun/security/pkcs11/ec/TestCurves.java                          8204203 windows-all
+sun/security/pkcs11/ec/TestECDH.java                            8204203 windows-all
+sun/security/pkcs11/ec/TestECDH2.java                           8204203 windows-all
+sun/security/pkcs11/ec/TestECDSA.java                           8204203 windows-all
+sun/security/pkcs11/ec/TestECDSA2.java                          8204203 windows-all
+sun/security/pkcs11/ec/TestECGenSpec.java                       8204203 windows-all
+sun/security/pkcs11/rsa/KeyWrap.java                            8204203 windows-all
+sun/security/pkcs11/rsa/TestCACerts.java                        8204203 windows-all
+sun/security/pkcs11/rsa/TestKeyFactory.java                     8204203 windows-all
+sun/security/pkcs11/rsa/TestKeyPairGenerator.java               8204203 windows-all
+sun/security/pkcs11/rsa/TestSignatures.java                     8204203 windows-all
+sun/security/pkcs11/sslecc/ClientJSSEServerJSSE.java            8204203 windows-all
+sun/security/pkcs11/tls/TestLeadingZeroesP11.java               8204203 windows-all
+sun/security/pkcs11/tls/TestMasterSecret.java                   8204203 windows-all
+sun/security/pkcs11/tls/TestPRF.java                            8204203 windows-all
 sun/security/pkcs11/tls/TestPremaster.java                      8204203 windows-all
 
 ############################################################################