I used the guided partition option (I tried encrypted, LVM, and non-LVM), and told it to use all of /dev/sda.
Am I doing something wrong, or is there a bug in grub?
Here's the relevant output from syslog:
Dec 27 21:31:41 grub-installer: info: Installing grub on 'dummy'
Dec 27 21:31:41 grub-installer: info: grub-install does not support --no-floppy
Dec 27 21:31:41 grub-installer: info: Running chroot /target grub-install --force "dummy"
Dec 27 21:31:41 grub-installer: Installing for x86_64-efi platform.
Dec 27 21:31:42 grub-installer: Could not prepare Boot variable: No such file or directory
Dec 27 21:31:42 grub-installer: grub-install: error: efibootmgr failed to register the boot entry: Input/output error.
Dec 27 21:31:42 grub-installer: error: Running 'grub-install --force "dummy"' failed.
Dec 27 21:31:53 main-menu[258]: (process:11777): File descriptor 3 (pipe:[1166]) leaked on lvdisplay invocation. Parent PID 12308: /bin/sh
Dec 27 21:31:53 main-menu[258]: (process:11777): File descriptor 4 (/dev/pts/0) leaked on lvdisplay invocation. Parent PID 12308: /bin/sh
Dec 27 21:31:53 main-menu[258]: (process:11777): File descriptor 5 (/dev/pts/0) leaked on lvdisplay invocation. Parent PID 12308: /bin/sh
Dec 27 21:31:53 main-menu[258]: (process:11777): File descriptor 6 (/dev/pts/0) leaked on lvdisplay invocation. Parent PID 12308: /bin/sh
Dec 27 21:31:53 main-menu[258]: (process:11777): Volume group "sda" not found
Dec 27 21:31:53 main-menu[258]: (process:11777): Cannot process volume group sda
Dec 27 21:31:53 main-menu[258]: WARNING **: Configuring 'grub-installer' failed with error code 1
Dec 27 21:31:53 main-menu[258]: WARNING **: Menu item 'grub-installer' failed.