Problems with Nacona Xeons

Scott Long scottl at
Sun Sep 11 10:29:34 PDT 2005

Sean wrote:
> David S. Besade wrote:
>> Hey Guys,
>> I have a Dual Xeon (With EM64T) system running FreeBSD 5.4 AMD64 - 
>> Release
>> (with a -stable kernel). I can't get the kernel to see my second CPU. 
>> I have
>> recompiled and retuned and done everything I could to get it to see the
>> second CPU. The guys on IRC (##Freebsd on freenode) told me to post 
>> this to
>> this list.
>> I do have the ACPI disabled as it doesn't work right yet. The 
>> Motherboard is
>> a Tyan S5350 ( ) running 
>> with
>> 2 Dual Nacona Core Xeons. I had the datacenter check the BIOS and 
>> everything
>> is as it should be. I have Registered ECC RAM on it as well.
>> Both CPU's were recogized by Centos 4.1 X86-64, however I prefer FBSD to
>> anything Linux. So if you guys could help me out I would appreciate it. I
>> think I have given you all the relevant information I Hope but if not 
>> just
>> ask me I will get it.
>> Thanks in advance
>> -Dave
>> _______________________________________________
>> freebsd-amd64 at mailing list
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> You said you did a kernel recompile, so did you include
> 'device        acpi'


You need 'device apic' here also.  There is a difference between 'acpi'
and 'apic.  For SMP amd64 machines, you should have both.  Simply put,
the apic is what allows the first CPU to start up the other CPUs during


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