Sparky self shut down after 24h

[DukeLander]

Hi folks,

I have Sparky installed on my older laptop, which has Klipper nad Samba installed, worked fine on older 6.x editions.
On 7.x although every power option is turned off, laptop simply shut down itself after 24h.
First I thought I have some hw problem, tried Ubuntu server, no shut down.
Went back to Sparky, same problem again.
Am I missing something, some option or....?

TYIA