Hi I just noticed that the thread irq/45-IMX-uart is the current thread. Nevertheless the interrupt for this thread is enabled which seems wrong to me? So the interrupt handler imx_rxint does not get call as it is always interrupted by the level triggered interrupt of the same hw source? Thanks Tim -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html