This has also happened for me, unfortunately using the final 16.04 desktop release. Also, it didn't only fail to install the OS, but also broke my previously working dual-boot (windows/ubuntu gnome) grub install, leaving me with a grub rescue prompt on boot.
I also tried installing Ubuntu Gnome Xenial (same error), and disabling software package downloads during install (to avoid running into a mirroring/inconsistent packages glitch) - I keep getting this message. I also noticed two things about the installer though (in German): On the first screen, the installer prompts you to install "$(RELEASE)" (sic), there seems a string replacement to be missing there. Also, when asked for the desired computer hostname, it says "-ToBeFilledByOEM" - to me this seems to be really obvious stuff that shouldn't have made it into a final LTS release distro? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1521132 Title: Failed to install Xenial in UEFI mode, failed with "grub-efi- amd64-signed package failed to install into /target/" To manage notifications about this bug go to: https://bugs.launchpad.net/grub-installer/+bug/1521132/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
