I have the same problem. On wired connection it constantly disconnects and connects. I am running Ubuntu VM inside vmware with NAT network adapter setting. It had been stable for a long time, but this last week has been incredible horrible.
Linux ubuntu 5.4.0-48-generic #52-Ubuntu SMP Thu Sep 10 10:58:49 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux Distributor ID: Ubuntu Description: Ubuntu 20.04.1 LTS Release: 20.04 Codename: focal -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1666432 Title: Internet drops every few minutes on wired and wireless connection To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1666432/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs