Hi Marco, I didn't notice it that there is no "ht" sign in the flags info below until you pointed it out. I'm sorry. But I do have another machine with one hyper-threading CPU, so never mind. Thanks for all. :-) $ cat /proc/cpuinfo flags : fpu vme de pse tsc msr mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss > your CPU does not appear to support HT since it is a Centrino > processor... James