On dio-1.1-b41-linux-armv6hf.jar executed with DIO VTS 1.1 test:
 sqe/uart/functional/index.html#UARTListenerBufferOverrun
fails.

In RPI board console there is following output:
1479724918550: Agent has been registered:b71de41f
1479724918555: New registration ticket: [RegistrationTicket: id=b71de41f validity=true created=1479724918549 duration=120sec validUntil=1479725038549]
[Dynamic-linking native method java.lang.System.identityHashCode ... JNI]
1479724918577: EXECUTOR b71de41f:0 STARTED com.sun.tck.j2me.execution.client.Agent
1479724919592: EXECUTOR:b71de41f:0: starts (ExecutionRequest: id=sqe/uart/functional/index.html#UARTListenerBufferOverrun_uart0, name=com.sun.tck.cdc.lib.ExecCLDCTestOnCDCSameJVMCmd args=sqe.uart.functional.UARTListenerBufferOverrun -uart {"shareable":"false","stopBits":["1"],"flowcontrol":["0"],"externalDevice":"No","performanceDataLengthPerRound":"128","parity":["0"],"session":[],"dataBits":["8"],"deviceId":"100","baudRate":["9600"],"uartType":"UART","performanceThreshold":"130000","performanceDataAmount":"2","loopbackControl":"Yes","intfClassName":"jdk.dio.uart.UART"} isRemote=true)
[Dynamic-linking native method java.io.UnixFileSystem.getLength ... JNI]
    OK - In checkListenerBufferOverrun() ...
[Dynamic-linking native method java.lang.Class.isInstance ... JNI]
[Dynamic-linking native method com.oracle.dio.uart.impl.UARTImpl.openUARTByConfig0 ... JNI]
[Dynamic-linking native method com.oracle.dio.impl.EventQueue.setNativeEntries ... JNI]
[Dynamic-linking native method com.oracle.dio.uart.impl.UARTImpl.setEventListener0 ... JNI]
    OK - Successfully set an event listener for INPUT_BUFFER_OVERRUN on the Device
    OK - Have written out 0 KB ...
[Dynamic-linking native method com.oracle.dio.uart.impl.UARTImpl.write0 ... JNI]
and then test hangs.

Please find attached interview file.