I just pulled down a fresh copy of 18.04.02 server ISO. (ubuntu-18.04.2-live-server-amd64.iso) During the install I try to set a static IP but when I select Save it just starts the install process over and goes right back to DHCP. I have tested this on ESXi 6.5 and VirtualBox.
2 Answers
The new Subiquity Installer has a few problems, the alternate Ubuntu download (ubuntu-18.04.2-server-amd64.iso) allows you to install using the traditional installer which is better until the issues are ironed out, YMMV.
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This is a reported bug: bugs.launchpad.net/ubuntu/+source/subiquity/+bug/1816954– ndemarcoJan 6, 2020 at 20:57
This reported bug is fixed in a newer version of Ubiquity installer. If you experience this during installation, switch to tty2 (press ALT-F2 on your keyboard) and run
$ snap refresh subiquity"
The installer will be refreshed, and you'll get a version of the installer with this bug fixed.
Switch back to tty1 (press ALT-F1) and continue setting up a manual IPv4 address. You may notice some text and options are slightly different.