I'd try testing the latest point release of Ubuntu 18.04 instead of the image that you used. You can find the latest 18.04 iso here:
http://releases.ubuntu.com/18.04.2/ubuntu-18.04.2-desktop-amd64.iso
I'd try testing the latest point release of Ubuntu 18.04 instead of the image that you used. You can find the latest 18.04 iso here:
http:// releases. ubuntu. com/18. 04.2/ubuntu- 18.04.2- desktop- amd64.iso