i sent you mail with 3 log and config files, as request, from you and from https://www.nomachine.com/AR07K00677.
I attach too in this reply post.
Other explain :
> when gnome shell freeze, i walk to physical pc, and the situation is that mouse and keyboard are unusable, but i can use ctrl-alt+F6 to switch to ttyx for reboot.
Tnk’s a lot.