It's really strange but my KDE Neon is freezing occasionally and to fix it I have to hard reset my PC.
The last freeze was about an hour ago. I was going away from my PC for about an hour and when I back I saw that it was crashed.
Here is the syslog: https://pastebin.com/njGy1LJq

I think that adding of intel_idle.max_cstate=1 to Grub fixed my problem.
About a week without single freeze.

Hi, achesirov

Congrats! I have never experienced a problem like that but it is worth nothing to have a post for help us meanwhile.

Regards,