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Solved Olimex A20 - CPUs

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I think there is something wrong with Linux OlimexA20 4.2.0-sunxi #1 SMP Wed Sep 16 10:57:53 CEST 2015 armv7l GNU/Linux.



root@OlimexA20:~# cat /proc/cpuinfo
processor       : 0
model name      : ARMv7 Processor rev 4 (v7l)
BogoMIPS        : 27.78
Features        : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x0
CPU part        : 0xc07
CPU revision    : 4

Hardware        : Allwinner sun7i (A20) Family
Revision        : 0000
Serial          : 1651665802018eb1
root@OlimexA20:~# lscpu
Architecture:          armv7l
Byte Order:            Little Endian
CPU(s):                2
On-line CPU(s) list:   0
Off-line CPU(s) list:  1
Thread(s) per core:    1
Core(s) per socket:    1
Socket(s):             1
Model name:            ARMv7 Processor rev 4 (v7l)
CPU max MHz:           960,0000
CPU min MHz:           144,0000
root@OlimexA20:~# nproc

Why there is only one core working?


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Because there was a bug in upgrade script. You need to upgrade boot loader to the "next". Remove the one without "next" just in case. dpkg -r linux-u-boot-lime2 or ...


Lime 1 with A20 and 512Mb RAM

apt-get install linux-u-boot-lime-next



Lime 2 with A20 and 1024Mb RAM

apt-get install linux-u-boot-lime2-next


apt-get install linux-u-boot-micro-next


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