3 Ubuntu Machines with no networking

Job ID: 36739073

Budget: $15 – $25 USD

Run a variety of Windows, MAC and Ubuntu machines in our office. Everything working fine, well until this morning when 3 of the Ubuntu machines are all showing no network but ethernet cables (and Wifi) settings untouched since Friday.

Bit of messing around with the connections and had no joy this morning. They're all showing Connection failed Activation of network connection failed.

Grabbed a USB and booted up from a fresh download of 23.04 and got the same issue - this on 2 different machines.

Reformatted one of the machines, installed 23.04 and same issue. Tried a virgin "try Ubuntu" on the other machine and same issue.

Been using Ubuntu for 10 years+ and have never seen anything like this. Could it be an update that caused the issue?

Windows and MAC machines working fine, and 2 Ubuntu machines running 22.04 and 20.04 running fine.

Need someone with experience in Linux / Ubuntu to help resolve the issue. Please reach out for more details.