LattePanda 3 Delta randomly powers off

Hello,
my LattePanda Delta 3 arrived.
I immediately installed Ubuntu on it:
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.04.1 LTS
Release: 22.04
Codename: jammy
Unfortunately it randomly just powers off. Sometimes after some hours but it never kept running for three days in a row.
What could be the reason?
I cannot replace my raspi until this is solved.
I had the same problem. At first I thought it was because I installed Linux, do I reinstalled Windows 10. It started happening there also. I eventually decided to try a higher-Watt power supply. My personal USB-C PD power supply could do 20V at 3.5A (the provided could only to 2.25 at 20V). Since I did this it hasn't happened and I went back to Linux. I think for me this happened because I added an NVME drive, which drew too much additional power. I'll probably but an even higher watt USB-C power supply just to make sure I have enough overhead.

FYI, to giver myself plenty of headroom, I've upgraded to an inexpensive 100-Watt PD USB-C power supply and have not had a single random shutdown since. I don't think the provided power supply is strong enough.
Thanks, now I also bought a more powerful power supply (should be enough to even power a notebook) and it did not power off in the last seven days.
Now I replaced my pi with the latte panda and hope it runs stable.
But it is a shame that the power supply cannot even power a headless linux server. There is not even mouse or keyboard attached. Just ethernet.
I would not mind if the latte panda was cheaper.... but for that price....
But thanks for your help.
I have observed the same behaviour both with Windows 10 and Ubuntu 22.04LTS.
With Ubuntu, when the LP3 enters suspend, the green LED lights and it can be woken using a USB mouse or keyboard, as expected. However, over time (say overnight) I observed the green LED goes out and the LP3 will no longer wakeup. It appers to have powered down.
I have tried pressing the power button to see if that will wakup the LP3, but then it just goes through a powerup sequence and performs a cold boot.
I will keep monitoring. I was thinking it could be a bios setting somewhere but I don't see anything that it could be?

Thanks for the reply.
I also did not find an option in the BIOS.
Why does it shutdown? I installed Ubuntu server. Under no way it should shutdown.
$ last -xpanda pts/1 192.168.0.24 Thu Aug 11 21:42 still logged inpanda pts/1 10.7.0.2 Thu Aug 11 18:40 - 18:40 (00:00)panda pts/1 10.7.0.2 Thu Aug 11 08:49 - 08:50 (00:00)runlevel (to lvl 5) 5.15.0-43-generi Thu Aug 11 07:24 still runningreboot system boot 5.15.0-43-generi Thu Aug 11 07:24 still runningpanda pts/2 192.168.0.24 Wed Aug 10 19:30 - 19:30 (00:00)panda pts/2 192.168.0.29 Wed Aug 10 06:32 - 06:32 (00:00)panda pts/2 192.168.0.24 Sun Aug 7 22:09 - 22:10 (00:00)panda pts/2 192.168.0.24 Sun Aug 7 21:57 - 21:58 (00:00)runlevel (to lvl 5) 5.15.0-43-generi Sun Aug 7 21:48 - 07:24 (3+09:36)reboot system boot 5.15.0-43-generi Sun Aug 7 21:48 still runningpanda pts/3 10.7.0.2 Sun Aug 7 20:29 - 20:29 (00:00)panda pts/3 10.7.0.2 Sun Aug 7 18:33 - 18:33 (00:00)panda pts/3 10.7.0.2 Sun Aug 7 13:17 - 13:17 (00:00)panda pts/3 192.168.0.14 Sun Aug 7 01:06 - 01:06 (00:00)panda pts/3 192.168.0.14 Sun Aug 7 00:52 - 00:58 (00:05)panda pts/3 192.168.0.24 Sat Aug 6 09:16 - 09:17 (00:00)panda pts/5 :pts/3:S.0 Fri Aug 5 17:45 - 17:46 (00:00)panda pts/3 192.168.0.29 Fri Aug 5 17:43 - 17:46 (00:02)runlevel (to lvl 5) 5.15.0-43-generi Fri Aug 5 17:43 - 21:48 (2+04:05)reboot system boot 5.15.0-43-generi Fri Aug 5 17:43 still runningpanda pts/0 :pts/3:S.0 Fri Aug 5 12:42 - 12:42 (00:00)panda pts/5 :pts/3:S.0 Fri Aug 5 12:41 - 12:42 (00:00)panda pts/4 :pts/3:S.0 Fri Aug 5 12:41 - 12:41 (00:00)panda pts/3 10.7.0.2 Fri Aug 5 12:41 - 12:42 (00:01)panda pts/3 192.168.0.24 Fri Aug 5 06:51 - 06:51 (00:00)panda pts/3 192.168.0.24 Fri Aug 5 00:29 - 00:53 (00:24)panda pts/5 :pts/3:S.0 Thu Aug 4 21:54 - 21:54 (00:00)panda pts/4 :pts/3:S.0 Thu Aug 4 21:38 - 21:38 (00:00)panda pts/3 192.168.0.24 Thu Aug 4 19:22 - 22:39 (03:17)panda pts/3 10.7.0.2 Thu Aug 4 18:35 - 18:35 (00:00)panda pts/3 10.7.0.2 Thu Aug 4 17:50 - 17:51 (00:00)panda pts/3 10.7.0.2 Thu Aug 4 17:26 - 17:26 (00:00)panda pts/3 10.7.0.2 Thu Aug 4 14:24 - 14:24 (00:00)panda pts/3 10.7.0.2 Thu Aug 4 10:15 - 10:15 (00:00)panda pts/3 10.7.0.2 Thu Aug 4 09:56 - 09:56 (00:00)panda pts/3 10.7.0.2 Thu Aug 4 07:53 - 07:53 (00:00)panda pts/3 192.168.0.29 Thu Aug 4 06:38 - 06:38 (00:00)runlevel (to lvl 5) 5.15.0-43-generi Thu Aug 4 06:37 - 17:43 (1+11:05)reboot system boot 5.15.0-43-generi Thu Aug 4 06:37 still runningpanda pts/4 10.7.0.2 Wed Aug 3 23:47 - 23:47 (00:00)panda pts/2 :pts/3:S.0 Wed Aug 3 23:32 - 23:57 (00:24)panda pts/2 :pts/3:S.0 Wed Aug 3 23:30 - 23:30 (00:00)panda pts/5 10.7.0.2 Wed Aug 3 23:26 - 23:26 (00:00)panda pts/3 192.168.0.24 Wed Aug 3 18:42 - 00:27 (05:44)runlevel (to lvl 5) 5.15.0-43-generi Wed Aug 3 20:41 - 06:37 (09:56)reboot system boot 5.15.0-43-generi Wed Aug 3 20:41 still runningpanda pts/3 192.168.0.33 Wed Aug 3 12:46 - 12:46 (00:00)panda pts/3 192.168.0.29 Wed Aug 3 07:18 - 07:18 (00:00)panda pts/3 192.168.0.29 Wed Aug 3 07:17 - 07:18 (00:00)panda pts/3 192.168.0.29 Wed Aug 3 06:23 - 06:24 (00:00)runlevel (to lvl 5) 5.15.0-43-generi Tue Aug 2 23:41 - 20:41 (21:00)panda pts/3 192.168.0.24 Tue Aug 2 23:41 - 00:00 (00:19)reboot system boot 5.15.0-43-generi Tue Aug 2 23:40 still runningshutdown system down 5.15.0-43-generi Tue Aug 2 23:29 - 23:40 (00:11)panda pts/3 192.168.0.24 Tue Aug 2 23:10 - 23:29 (00:19)panda pts/4 192.168.0.24 Tue Aug 2 22:41 - 22:42 (00:00)panda pts/4 192.168.0.24 Tue Aug 2 22:41 - 22:41 (00:00)panda pts/3 192.168.0.24 Tue Aug 2 22:29 - 23:01 (00:31)runlevel (to lvl 5) 5.15.0-43-generi Tue Aug 2 22:29 - 23:29 (01:00)reboot system boot 5.15.0-43-generi Tue Aug 2 22:28 - 23:29 (01:00)shutdown system down 5.15.0-43-generi Tue Aug 2 22:28 - 22:28 (00:00)panda pts/2 :pts/3:S.0 Tue Aug 2 22:16 - 22:16 (00:00)panda pts/3 192.168.0.24 Tue Aug 2 22:16 - 22:28 (00:11)runlevel (to lvl 5) 5.15.0-43-generi Tue Aug 2 22:15 - 22:28 (00:12)reboot system boot 5.15.0-43-generi Tue Aug 2 22:15 - 22:28 (00:12)shutdown system down 5.15.0-43-generi Tue Aug 2 22:14 - 22:15 (00:00)panda pts/0 192.168.0.24 Tue Aug 2 22:10 - 22:14 (00:04)runlevel (to lvl 5) 5.15.0-43-generi Tue Aug 2 22:09 - 22:14 (00:05)reboot system boot 5.15.0-43-generi Tue Aug 2 22:08 - 22:14 (00:05)shutdown system down 5.15.0-43-generi Tue Aug 2 22:08 - 22:08 (00:00)panda pts/2 192.168.0.24 Tue Aug 2 21:03 - 21:03 (00:00)panda pts/0 192.168.0.24 Tue Aug 2 21:02 - 22:07 (01:05)panda pts/0 192.168.0.24 Tue Aug 2 20:48 - 21:01 (00:12)runlevel (to lvl 5) 5.15.0-43-generi Tue Aug 2 20:46 - 22:08 (01:22)reboot system boot 5.15.0-43-generi Tue Aug 2 20:45 - 22:08 (01:22)
wtmp begins Tue Aug 2 20:45:51 2022

There is not much running on it.
The uptime is between 0 and 0.1 at most:
$ uptime
21:45:33 up 14:21, 1 user, load average: 0.05, 0.12, 0.14
