I think i solve the problem using this process:
1º Fresh Ubuntu system. 2º Pick another driver for the chipset card -> rtlwifi-next -> https://github.com/rtlwifi-linux/rtlwifi-next 3º Reboot the machine.
So you can try to solve problem for stable version: 26th April Stable Ubuntu 18.04 LTS
NOTE: i can not confirme that this will work in the kernel 4.16.
I think i solve the problem using this process:
1º Fresh Ubuntu system. /github. com/rtlwifi- linux/rtlwifi- next
2º Pick another driver for the chipset card -> rtlwifi-next -> https:/
3º Reboot the machine.
So you can try to solve problem for stable version: 26th April Stable Ubuntu 18.04 LTS
NOTE: i can not confirme that this will work in the kernel 4.16.