Hi Peter I tried that and it the result is the same: Linux only finds, initializes and uses only 1 core ... :-( Is there anything else I can try to have Linux initialize all 4 cores? -- TIA Paolo On Tue, Feb 3, 2009 at 12:44 PM, Peter Kjellstrom <cap at nsc.liu.se> wrote: > On Tuesday 03 February 2009, Paolo Supino wrote: > > Hi > > > > I've installed CentOS 5.2 (i386) in a computer with a DG33BU > motherboard > > ... When I installed it it crashed because of ACPI issues. Searching > Google > > I found that I need to turn ACPI off in order to successfully install > > CentOS, which I did. > > After a while I noticed that because of ACPI is off the Linux kernel > > finds, initializes and uses only 1 CPU core in the Q6600 quad core CPU > that > > is installed in this computer :-( > > How can I force it to find, initialize and use all the 4 cores in the > > computer even if ACPI is off? > > Try to leave ACPI on and boot with "pci=nommconf" instead. This works on my > DG33 (mine is a TL not a BU though). > > /Peter > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20090203/e20d501f/attachment-0005.html>