[SOLVED] Arch doesn't detect all 4 cores

Deusdies · 2011-03-02 01:03:19

I have a Phenom II X2 550 Black Edition. I've unlocked the other 2 cores so that now I have 4 (and they've been doing great for the past year). All 4 cores worked in Windows 7 and Ubuntu 10.10 . However, I've just noticed that Arch detects (or rather kernel?) only 2 of them:

Here's output of cat /proc/cpuinfo:

processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 16
model           : 4
model name      : AMD Phenom(tm) II X2 550 Processor
stepping        : 2
cpu MHz         : 3113.613
cache size      : 512 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 2
apicid          : 0
initial apicid  : 0
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 mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt npt lbrv svm_lock nrip_save
bogomips        : 6229.69
clflush size    : 64
cache_alignment : 64
address sizes   : 48 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate

processor       : 1
vendor_id       : AuthenticAMD
cpu family      : 16
model           : 4
model name      : AMD Phenom(tm) II X2 550 Processor
stepping        : 2
cpu MHz         : 3113.613
cache size      : 512 KB
physical id     : 0
siblings        : 2
core id         : 1
cpu cores       : 2
apicid          : 1
initial apicid  : 1
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 mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt npt lbrv svm_lock nrip_save
bogomips        : 6230.67
clflush size    : 64
cache_alignment : 64
address sizes   : 48 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate

Any ideas?

Last edited by Deusdies (2011-03-02 01:27:28)

Deusdies · 2011-03-02 01:14:11

Never mind, rebooted, fiddled with some BIOS settings (from AUTO to all ENABLED) and it works.

Arch Linux

#1 2011-03-02 01:03:19

[SOLVED] Arch doesn't detect all 4 cores

#2 2011-03-02 01:14:11

Re: [SOLVED] Arch doesn't detect all 4 cores

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