[TEST_BUG] Test java/awt/Mixing/HWDisappear.java fails with GTKL&F

Testsuite name: Regression (jdk_awt)
Test name(s): java/awt/Mixing/HWDisappear.java
Product(s) tested: JDK 8u40b19(64-bit)
OS/architecture: Solaris(x64), 64-bit JDK

Error log file (if present): see comments

Reproducible: Always
Reproducible on machine: see comments
Is it a Regression: No
Regression introduced in release/build: N/A
Test result on the last GAed release for this train: Fail (JDK 8u25b17)
Test result on FCS: Fail (1.8.0 b132)

Is it a platform specific issue: No(failing in Linux and Solaris)

Exception/Error from Log:
----------System.err:(15/828)----------
java.lang.RuntimeException: The button cannot be clicked.
at HWDisappear.fail(HWDisappear.java:230)
at HWDisappear.init(HWDisappear.java:121)
at HWDisappear.main(HWDisappear.java:156)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.sun.javatest.regtest.MainWrapper$MainThread.run(MainWrapper.java:94)
at java.lang.Thread.run(Thread.java:745)

JavaTest Message: Test threw exception: java.lang.RuntimeException: The button cannot be clicked.
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: The button cannot be clicked.

Test run log location:
Steps to reproduce: see comments