Julian Echave wrote: > Hi, > > I'm running Centos 5.1 on an Intel Quad 2 Core with four Q6600 processors. > Despite Centos 5 supporting multiple cores (SPM), it doesn't seem to > work for me: > 1) a dmesg shows that only one processor is seen: > "SPM alternatives: switching to UP code", etc. > 2) file /proc/cpuinfo shows only one processor > 3) top with option 1 (to toggle between seeing all processors or an > average) shows only 1 processor. > > I've googled this, and other people have found this kind of trouble, > but I was not able to find any solutions. it might help diagnose this if you paste the output of 'dmesg' at least up to that "SMP Alternatives" message and maybe a couple more lines after it...