After I updated my desktop to Linux kernel version 5 when I logging in my network would disconnect/reconnect every 15 seconds or so. I wasn’t able to get on the internet. My ethernet cable was plugged directly into my motherboard and I don’t have wifi capabilities.

The Solution

I added this conf:

/etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

With this content:

[connection]
wifi.powersave=0

After a reboot all was well.