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[Patrick <question79271@xxxxxxxxxxxxxxxxxxxxx>]

New question #79271 on Ubuntu:
https://answers.launchpad.net/ubuntu/+question/79271

I have a quadcore intel q6600 cpu on an Asus P5K SE (p35 chipset) motherboard. I have xubuntu 9.04 installed, and the kernel right now is 2.6.28-13-generic #45-Ubuntu SMP Tue Jun 30 22:12:12 UTC 2009 x86_64.

Everything that reports cpu info is only reporting a single cpu/core. I have an error when I boot saying "Local APIC #0 not detected. Using dummy local APIC instead." If I try to remove the noapic and nolapic lines from my grub boot string the computer locks up while ubuntu is loading.

I had gentoo linux installed on this computer for years and smp/apic worked fine. What can I do to solve this problem with ubuntu?

I believe SMP is not working because apic is not on, but I cannot confirm that.

root@gohan:/home/patrick# cat /proc/cpuinfo 
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 15
model name	: Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
stepping	: 11
cpu MHz		: 1596.000
cache size	: 4096 KB
physical id	: 0
siblings	: 1
core id		: 0
cpu cores	: 1
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 10
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm tpr_shadow vnmi flexpriority
bogomips	: 4800.04
clflush size	: 64
cache_alignment	: 64
address sizes	: 36 bits physical, 48 bits virtual
power management:

root@gohan:/home/patrick# mpstat -P ALL
Linux 2.6.28-14-generic (gohan) 	08/06/2009 	_x86_64_	(1 CPU)

12:41:26 AM  CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest   %idle
12:41:26 AM  all   13.95    0.36    2.55    6.68    0.06    0.03    0.00    0.00   76.36
12:41:26 AM    0   13.95    0.36    2.55    6.68    0.06    0.03    0.00    0.00   76.36

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