Arch on Mac Mini (2010) shows only one core [SOLVED]

deadspider187 · 2012-06-05 19:23:21

Here's the /proc/cpuinfo output:

processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 23
model name	: Intel(R) Core(TM)2 Duo CPU     P8600  @ 2.40GHz
stepping	: 10
microcode	: 0xa07
cpu MHz		: 2389.066
cache size	: 3072 KB
physical id	: 0
siblings	: 1
core id		: 0
cpu cores	: 1
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 13
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 syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm dts tpr_shadow vnmi flexpriority
bogomips	: 4780.22
clflush size	: 64
cache_alignment	: 64
address sizes	: 36 bits physical, 48 bits virtual
power management:

uname -a:

Linux loxosceles 3.3.7-1-ARCH #1 SMP PREEMPT Tue May 22 00:26:26 CEST 2012 x86_64 GNU/Linux

This looks like it's only running on one core. Is this the case? Is this right?

Last edited by deadspider187 (2012-06-06 16:36:17)

deadspider187 · 2012-06-05 19:40:11

Nevermind. I found a solution. Changing the grub mode line to:

# (0) Arch Linux
title  Arch Linux
root   (hd0,3)
kernel /vmlinuz-linux root=/dev/sda5 ro nomodeset acpi=noirq pnpacpi=off
initrd /initramfs-linux.img

resolved it for me. I now get:

processor    : 0
vendor_id    : GenuineIntel
cpu family    : 6
model        : 23
model name    : Intel(R) Core(TM)2 Duo CPU     P8600  @ 2.40GHz
stepping    : 10
microcode    : 0xa07
cpu MHz        : 2389.216
cache size    : 3072 KB
physical id    : 0
siblings    : 2
core id        : 0
cpu cores    : 2
apicid        : 0
initial apicid    : 0
fpu        : yes
fpu_exception    : yes
cpuid level    : 13
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 syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm dts tpr_shadow vnmi flexpriority
bogomips    : 4780.53
clflush size    : 64
cache_alignment    : 64
address sizes    : 36 bits physical, 48 bits virtual
power management:

processor    : 1
vendor_id    : GenuineIntel
cpu family    : 6
model        : 23
model name    : Intel(R) Core(TM)2 Duo CPU     P8600  @ 2.40GHz
stepping    : 10
microcode    : 0xa07
cpu MHz        : 2389.216
cache size    : 3072 KB
physical id    : 0
siblings    : 2
core id        : 1
cpu cores    : 2
apicid        : 1
initial apicid    : 1
fpu        : yes
fpu_exception    : yes
cpuid level    : 13
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 syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm dts tpr_shadow vnmi flexpriority
bogomips    : 4780.53
clflush size    : 64
cache_alignment    : 64
address sizes    : 36 bits physical, 48 bits virtual
power management:

NOTE: Without pnpacpi=off in the grub line your machine will lockup!!!

Last edited by deadspider187 (2012-06-06 16:35:30)

bjornoslav · 2012-06-05 19:40:58

Yes, you're right, and it seems very weird. How did you install Arch? Did you use Boot Camp to make some space for Arch on the hard disk?

deadspider187 · 2012-06-05 19:45:09

I used rEFIt, and created a separate partition for Linux. Haven't yet gotten Windows on there. I had major problems with getting the arch boot CD to work until I found a thread mentioning disabling acpi and setting nomodeset, then I could install arch without any issues. Pretty solid build to be honest.

Inxsible · 2012-06-05 19:58:55

deadspider, could you please use code tags as opposed to quote tags when pasting snippets? code tags provide scrollers which helps in keeping the thread from getting too long on the page.

deadspider187 · 2012-06-06 14:11:13

Inxsible wrote:

deadspider, could you please use code tags as opposed to quote tags when pasting snippets? code tags provide scrollers which helps in keeping the thread from getting too long on the page.

Sorry about that!

Inxsible · 2012-06-06 15:29:24

deadspider187 wrote:

Inxsible wrote:
deadspider, could you please use code tags as opposed to quote tags when pasting snippets? code tags provide scrollers which helps in keeping the thread from getting too long on the page.
Sorry about that!

You can still edit your previous posts you know

deadspider187 · 2012-06-06 16:37:20

Inxsible wrote:

deadspider187 wrote:
Inxsible wrote:
deadspider, could you please use code tags as opposed to quote tags when pasting snippets? code tags provide scrollers which helps in keeping the thread from getting too long on the page.
Sorry about that!
You can still edit your previous posts you know

Done. Sorry for wasting your vertical space!

Arch Linux

#1 2012-06-05 19:23:21

Arch on Mac Mini (2010) shows only one core [SOLVED]

#2 2012-06-05 19:40:11

Re: Arch on Mac Mini (2010) shows only one core [SOLVED]

#3 2012-06-05 19:40:58

Re: Arch on Mac Mini (2010) shows only one core [SOLVED]

#4 2012-06-05 19:45:09

Re: Arch on Mac Mini (2010) shows only one core [SOLVED]

#5 2012-06-05 19:58:55

Re: Arch on Mac Mini (2010) shows only one core [SOLVED]

#6 2012-06-06 14:11:13

Re: Arch on Mac Mini (2010) shows only one core [SOLVED]

#7 2012-06-06 15:29:24

Re: Arch on Mac Mini (2010) shows only one core [SOLVED]

#8 2012-06-06 16:37:20

Re: Arch on Mac Mini (2010) shows only one core [SOLVED]

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