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

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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;

Solved by Werner

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? 

 

 

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,

hello ,

it seem the issue is back online <

don't know what should do with "armbian-install"

use the minimal-6.18-trixie image from frontpage to write to sd-card;

htop report that only thread1 is active? (thread 2-3-4 stay at 0% activity)

 

if evoke "armbian-install" it asks for a sdcard/usb/nvme > if let use a usb-stick - it writes something to it, but afterwards it would not boot from it?

surely, must have understood it wrongly.

 

thanks.

 

EDIT: sorry, nproc report "4", so the images should be good (did just not have enough activity, is suppose). still glad to haer what "armbian-install" could or should do in such a case, thanks.

Edited by kapqa42

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