Hi! I've got a linux 2.4 machine acting as a router, with an ATM (Fore PCA-200E) and two 3c905C nics. This system has been experiencing kernel panics since it was put in production state. I've tried several kernels (from 2.4.0-test to 2.4.2-ac21) with no luck. It always gives the same message (Unable to dereference null pointer, killing interrupt handler). The process shown in the crash message changed from time to time, sometimes it was the atm signaling daemon (atmsigd) and others the swapper. Reading the mailing list, I found some reference to the amount of swap needed with the 2.4 kernel series (2*RAM), but after increasing the swap area the problem persisted. At last, I tried increasing the RAM and deactivating the swap, and it seems that this was the rigth move, as the system has been working flawlessly afterwards. I am sorry I dont have the exact kernel panic's messages. I'm just telling this here in case it is of any help. Regards. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/