Public bug reported:
I have tried now different distros (Fedora Core 8, Knoppix 5.3) but all
fail to "enable" the 2nd core of my CPU when booting with (smp) i386 kernels.
What can be found from dmesg is the message that CPU#1 is not responding.
(known workarounds like "noapic nolapic acpi=noirq pci=noirq resulted in the
same problem).
When viewing /proc/cpuinfo only one processor is listed (I might be able to
attach that ouput later ...).
The only working solution so far is to install Hardy 8.04 beta for Amd64
CPUs.
The following output is from Hardy with amd64 kernel (/proc/cpuinfo):
processor : 0
vendor_id : AuthenticAMD
cpu family : 15
model : 107
model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4200+
stepping : 2
cpu MHz : 1000.000
cache size : 512 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
fpu : yes
fpu_exception : yes
cpuid level : 1
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 rdtscp lm 3dno
wext 3dnow rep_good pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy 3dnowpref
etch
bogomips : 2061.61
TLB size : 1024 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp tm stc 100mhzsteps
processor : 1
vendor_id : AuthenticAMD
cpu family : 15
model : 107
model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4200+
stepping : 2
cpu MHz : 1000.000
cache size : 512 KB
physical id : 0
siblings : 2
core id : 1
cpu cores : 2
fpu : yes
fpu_exception : yes
cpuid level : 1
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 rdtscp lm 3dno
wext 3dnow rep_good pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy 3dnowpref
etch
bogomips : 2061.61
TLB size : 1024 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp tm stc 100mhzsteps
As this is a desktop machine (Acer slimeline PC sold here as "L5100") I would
prefer
using i386 kernel OS (for the time being).
Erik
** Affects: ubuntu
Importance: Undecided
Status: New
--
Second CPU/Core not working with i386 kernel
https://bugs.launchpad.net/bugs/213011
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