Hello, being aware of the risk to bother some people here I would nevertheless really appreciate your help with the following issue: Is there any difference in the request_irq() function call in comparison to the one in the normal kernel? I'm trying to run request_irq(irq, interrupt_handler, IRQF_SHARED | IRQF_DISABLED | IRQF_NODELAY, MODULE_IDENT, &stage) on 2.6.31.6-rt19 but it doesn't call interrupt_handler() when an interrupt is received. In the plain kernel 2.6.31 it works with this call: request_irq(irq, interrupt_handler, IRQF_SHARED | IRQF_DISABLED, MODULE_IDENT, &stage) Do you have hints to literature / tutorials / code I should look at? I would really appreciate any kind of help, thanks, Julian -- 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