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Old 04-28-2006, 09:25 PM   #1
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dual core not recognized even with SMP kernel mode (suse 10)

in suse 10,
i installed kernel 2.6.13 smp (had to remove the regular one, otherwise it wouldn't boot)

and I do get some info in the /proc/cpuinfo, but still only one processor is being listed:

processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Pentium(R) D CPU 2.66GHz
stepping : 7
cpu MHz : 2660.821
cache size : 1024 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm pni monitor ds_cpl tm2 cid cx16 xtpr lahf_lm
bogomips : 5329.07

is this normal? shouldn't be there like processor: 1 ......... as well?
Old 04-29-2006, 02:20 AM   #2
Registered: Aug 2005
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It really depends on the processor and the bios. Is there a bios setting to disable the second core? What do you get from dmidecode?

What processor & motherboard do you have? I might be able to reproduce this next week (if it isn't a bios issue).
Old 04-29-2006, 08:42 AM   #3
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model name : Intel(R) Pentium(R) D CPU 2.66GHz

The kernel identifies the cpu as Pentium D (dual core).

cpu cores : 2

Both cores are recognized.

processor : 0

The first cpu is processor 0. If you had two dual-core cpus on the same mainboard, the second would be processor 1.
Old 04-30-2006, 07:08 PM   #4
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the motherboard is Asus P5DV1.. the only decent mainboard with DDR not DDR2, SATA & ATA, AGP &PCIe. if only it had sata2 and 1392.. it would be perfect.

in smp, though, when I close konqueror or firefox i usually get a panic/application crash..
Old 04-30-2006, 08:53 PM   #5
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There is usually a bios setting to turn "hyperthreading" on and off. The CPU will still be recognized by the kernel as dual core, even with hyperthreading off in the bios. But, if you turn hyperthreading on, 2 cpu's should initialize.
Old 05-02-2006, 12:08 AM   #6
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I'm trying to find that boards spec's, but I'm not finding it on Asus web site. Could you please send me the output from 'dmidecode |fgrep "Product Name"'. This should contain your exact motherboard info, as known by the bios.

Also, if you know, what chipset is it? It's possible that that particular board (or bios) doesn't support the dual core processors. Electrically they are pretty much the same.


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