Hi, Just to follow up on my own post, the problem is way down in the network driver layer, specifically in the ibmtr driver - it seems to be happy with 2.2, and barfs with 2.4 - for now I replaced it with an IBM pci card (olympic driver) and 2.4 is now solid on the machine that had serious problems using the isa token ring card. I'l have a look at ibmtr if nobody beats me to it. jjs - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/