I managed to get this working by coldbooting the machine, then ran:
sudo update-grub # this fixes the missing GRUB config
Next I installed Vim -- APT figured out that shim-signed hadn't been configured, and retried. This time it succeeded!
The machine came with Windows 7 Embedded, and I warm-booted into the installer (reboot from Windows, select "boot from USB stick" in the BIOS boot menu). I suspect the warm-booting may be a factor.
Regardless, I will probably be doing a reinstall on this machine anyway and will update the ticket if I find out anything further.
Hi Steve, thanks for the response.
I managed to get this working by coldbooting the machine, then ran:
sudo update-grub # this fixes the missing GRUB config
Next I installed Vim -- APT figured out that shim-signed hadn't been configured, and retried. This time it succeeded!
The machine came with Windows 7 Embedded, and I warm-booted into the installer (reboot from Windows, select "boot from USB stick" in the BIOS boot menu). I suspect the warm-booting may be a factor.
Regardless, I will probably be doing a reinstall on this machine anyway and will update the ticket if I find out anything further.