I just encountered this upon upgrading a 10.04 64bit VM. Like Richard, I found that grub-pc/install_devices was empty. Following his suggestions and setting a value for this debconf field does indeed fix it. Perhaps an upgrade should check this field and if empty prompt for a value?
I just encountered this upon upgrading a 10.04 64bit VM. Like Richard, I found that grub-pc/ install_ devices was empty. Following his suggestions and setting a value for this debconf field does indeed fix it. Perhaps an upgrade should check this field and if empty prompt for a value?