Installing Ubuntu Server 16 from ISO in UEFI mode on a Hyperv Gen2 virtual machine with preseed file. This worked without issues on Ubuntu Server 14.
I am looking for the preseed command to bypass this screen. I answer yes.
Partition disks This machine's firmware has started the installer in UEFI mode but it looks like there may be existing operating System already installed using BIOS compatiblity mode. If you continue to install Debian in UEFI mode, it might be difficult to reboot the machine into any BIOS-mode operating system later.
If you wish to install UEFI mode and don't care about keeping the ability to boot one of the existing systems, you have the option to force that here. If you wish to keep the option to boot an existing operating system you should choose NOT to force UEFI installtion here.
Force UEFI installation?
Both Seed File have the same issue.
Seed File #1 used for
d-i partman-auto/method string lvm
d-i partman-auto-lvm/guided_size string max
d-i partman-auto/choose_recipe select atomic
d-i partman-partitioning/confirm_write_new_label boolean true
d-i partman/confirm_write_new_label boolean true
d-i partman/choose_partition select finish
d-i partman/confirm_nooverwrite boolean true
d-i partman/confirm boolean true
d-i partman-auto/purge_lvm_from_device boolean true
d-i partman-lvm/device_remove_lvm boolean true
d-i partman-lvm/confirm boolean true
d-i partman-lvm/confirm_nooverwrite boolean true
d-i partman-auto/init_automatically_partition select Guided - use entire disk and set up LVM
d-i partman/choose_partition select Finish partitioning and write changes to disk
d-i partman-auto-lvm/no_boot boolean true
d-i partman-md/device_remove_md boolean true
d-i partman-md/confirm boolean true
d-i partman-md/confirm_nooverwrite boolean true
Seed File #2
# disk partitioning
d-i partman/confirm_write_new_label boolean true
d-i partman/choose_partition select finish
d-i partman/confirm_nooverwrite boolean true
d-i partman/confirm boolean true
d-i partman-auto/purge_lvm_from_device boolean true
d-i partman-lvm/device_remove_lvm boolean true
d-i partman-lvm/confirm boolean true
d-i partman-lvm/confirm_nooverwrite boolean true
d-i partman-auto-lvm/no_boot boolean true
d-i partman-md/device_remove_md boolean true
d-i partman-md/confirm boolean true
d-i partman-md/confirm_nooverwrite boolean true
d-i partman-auto/method string lvm
d-i partman-auto-lvm/guided_size string max
d-i partman-partitioning/confirm_write_new_label boolean true