Julian Echave wrote: > Sure, find below, I add other stuff as well. Note that there is some > bug in the Bios. This does not prevent Centos to boot, and, since > Windows sees all four processors, I reckon it shouldn't be the problem...? yeah, looks like its probably broken ACPI data in the BIOS. see if the mainboard or system vendor has a BIOS update to fix this. just because operating system "X" works, doesn't mean its 'right'.