Normally when installing Ubuntu server after selecting the language you can press F4 to access alternative installation modes, and from there you can choose to install a minimal system as per the following example screenshot:
I have recently upgraded my host from 16.04 (with Virtual Machine Manager 1.3.2 and VirtualBox 6.1.2) to 20.04 (with Virtual Machine Manager 2.2.1 and VirtualBox 6.1.6). Now when I try to install Ubuntu Server as a KVM or VirtualBox guest, the option for a minimal install is missing:
I have tried with both 18.04 and 20.04 as the guest OS, using the exact same ISO images that I was previously using in the 16.04 host. The only conclusion I can reach therefore is that the installer is detecting something in the host and removing the minimal install option.
What can I do to bring back the option? Solution preferred with Virtual Machine Manager/KVM as I only used VirtualBox to see if the problem was replicated there.
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