You try to install Ubuntu in EFI mode, but you do not have an EFI- System-Partition.
If you have Windows installed on the same disk, install Ubuntu in BIOS mode to get a working dual boot. ** Changed in: grub-installer (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1704555 Title: Error writing Grub install on Thinxpad x220 aaide Windows 10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1704555/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs