Pine A64+ latest armbian - CPU 2/3/4 offline?

[kapqa]

Hello ,

 

i have used now for some year armbian for this board,

very many thanks for that;

 

lately have updated to newer version Debian Trxiie

and found that "htop" report a higher CPU usage after freshboot (around 50%) whereas previously it sat a 10% probably;

 

now when evoking htop it gives (CPU offline for core 2-3-4)

also nproc report "1" instead of "4"=?

 

 

not sure if this an error ; 

noticed a similar report of nproc also with a build of volumio;

 

 

thank you very much;

[Werner]

Known issue on multiple older 64 bit Allwinner socs

Try these: https://fi.mirror.armbian.de/incoming/igorpecovnik/pine64/archive/

[pi-rat]

Hello,

 

I am experiencing  the same issue: CPU1-3 are offline, and they can't be activated by

 

echo 1 >  /sys/devices/system/cpu/cpu1/online

 

or similar commands, the system is responding with "invalid argument" error.

 

I did not notice this nuisance until last week. I would like not having to reinstall the hole system, because it is running my Nextcloud and some other home services. Is there any way to install a kernel that uses all 4 CPU, without having to reinstall the hole system? 

 

Will it work, if I just copy /boot from one of the older images onto the sdcard in use? 

 

 

[Igor]

On 7/15/2026 at 4:51 PM, pi-rat said:

Is there any way to install a kernel that uses all 4 CPU, without having to reinstall the hole system? 

 

Of course. Kernel upgrade is handled via standard apt get update and upgrade. If you need to change to specific kernel, use https://docs.armbian.com/User-Guide_Armbian-Config/System/#alternative-kernels

Make sure to update all packages before going that route,

 

IIRC this problem is related to u-boot. Which is updated after all packages are up2date with armbian-install utility,