I'd recommend comparing the BIOS versions with something like: "dmidecode | grep -A4 BIOS" to see if there's a correlation between the ones that got the UP kernel instead of the SMP kernel. > It happened to me too. I figured I was the one made an error and > manually fixed the "broken" ones. Mine were a mixture of HT-enabled > P4's (which would normally run the smp kernel) and some dual opteron > machines. These are all rack servers configured identically so I'm not > sure what triggered the behaviour in some of them without affecting them > all. Wierd. -Jay