I found a workaround: I booted with the live USB, and changed the pre- existing swap partition on the installation target (/dev/sda) to a EFI partition. Then the grub-install progressed without error because it could write to that partition. My install was on a MBR disk and I'm not booting EFI.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1923731 Title: Can't install from USB, at the end can't copy to /boot/something and update-grub fails with "no space left on device", but there is space To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1923731/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
