Why is only 1 cpu starting under 9.10

[drew einhorn]

On Sun, Nov 8, 2009 at 9:49 PM, Lucio M Nicolosi <lmnicolosi at gmail.com> wrote:
> On Mon, Nov 9, 2009 at 12:46 AM, drew einhorn
>
>> http://pastebin.com/m5778920b
>>
>> --
>> Drew Einhorn
>
> After comparing your log with my own I would say (obviously) that one
> of your cores seems not to be responding properly. Perhaps someone
> wiser can tell you if the software could be responsible.
>
> [mine]
>
> 0.116410] CPU0: AMD Athlon(tm) 64 X2 Dual Core Processor 4600+ stepping 02
> [    0.120000] Booting processor 1 APIC 0x1 ip 0x6000
> [    0.010000] Initializing CPU#1
> [    0.010000] Calibrating delay using timer specific routine..
> 4799.97 BogoMIPS (lpj=23999898)
> [    0.010000] CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
> [    0.010000] CPU: L2 Cache: 512K (64 bytes/line)
> [    0.010000] CPU 1/0x1 -> Node 0
> [    0.010000] CPU: Physical Processor ID: 0
> [    0.010000] CPU: Processor Core ID: 1
> [    0.010000] mce: CPU supports 5 MCE banks
> [    0.010000] x86 PAT enabled: cpu 1, old 0x7040600070406, new 0x7010600070106
> [    0.270402] CPU1: AMD Athlon(tm) 64 X2 Dual Core Processor 4600+ stepping 02
> [    0.270417] Brought up 2 CPUs
>
> [yours]
>
> #
> 0.105541] CPU0: Intel(R) XEON(TM) CPU 2.40GHz stepping 04
> #
> [    0.108001] Booting processor 1 APIC 0x2 ip 0x6000
> #
> [    5.148674] Not responding.
> #
> [    5.148756] Brought up 1 CPUs
> #
> [    5.148762] Total of 1 processors activated (4785.97 BogoMIPS).
>

Pretty sure both cpus were working the last time I paid any attention,
which was 9.04 (I think, perhaps earlier and I just didn't notice when
it first stopped working).  The 9.10 upgrade left some older kernels
in /boot I'll see what happens when I try to start them.

Here's a link to a dmesg from the latest 9.04 kernel.  It does start both cpus

http://pastebin.com/m5bf8615c

Will 9.10 be happy with the older 9.04 kernel from jaunty,
or is it expecting a kernel configured for 9.10?

Should I limp along with one cpu, or should I run with kernel
from jaunty?

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-- 
Drew Einhorn