Ubuntu crash when idle 18.04 V191231

[peerobo]

I’m using Vim1 for Pi.Hole server.
After setting the static ip address with netplan, everything runs fine.
The os is Ubuntu server 18.04 version V191231.
Then every sometime, the os is crash, I cannot ssh to vim1 and have to hard reset.
Below is the dmesg log, and I found something at the end, maybe it was the culprit but I didn’t understand. Could anyone please help me?
DMESG log

[Vladimir.v.v]

hi, something looks like a broken connection, maybe the router is to blame or the provider?)
If it seems to you that the problem is in the OS, you can try reinstalling

[peerobo]

Thanks for your reply.
If it were the router, then why I had working connection in other device? Why did you think the router were the problem?
If it were the OS, then what caused the issue?
What do you think it is the stable ubuntu version for using with vim 1?

[Electr1]

@peerobo try getting a fresh Linux image…
You can try this to make a new image…

Making Fenix images in Github

Hi guys, This was just a little thing we attempted and came out successfully in a few tries, for anyone who needs a fresh build of Ubuntu or Debian using Fenix, you can now do it without having a Linux computer, all thanks to Github CI/actions, I’d like to thank the team at the Khadas discord group who helped me with this, and showed me the way through this little project with just a Github account, you can do these simple steps to get jumpstarted and have a latest image that is also up to d…

Or you can tell me I can make it for you…

[Vladimir.v.v]

in fact, anything is possible, if everything was fine before that, and then it became not very good, here you need to track consistently

[Electr1]

@peerobo I went ahead to prepare a image for you…
I hope these configurations suit your need…

[peerobo]

I will try your config when I have free time. Thanks.