x240 uefi ubuntu 12.04.4

http://askubuntu.com/questions/355034/ubuntu-12-04-3-lts-installation-failed-says-grub-installation-failed

http://forum.ubuntu.com.cn/viewtopic.php?f=48&t=446368&p=3019940

the grub-efi-amd64-signed package failed to install into /target/. Without the GRUB bootloader the system will not load

uefi安裝，總是報錯，當然我肯定設定了efi分區。還是失敗，原來這是個bug，暈彩

It's a bug.

/pool/main/g/grub2-signed/grub-efi-amd64-signed 1.9~ubuntu12.04.4+1.99-21ubuntu3.10_amd64.deb

file rename when you burn it in CD/DVD or usb disk to

grub-efi-amd64-signed 1.9~ubuntu12.04.4+1.99-21ubuntu3.10_amd.deb

. As a result installation script can't find the file and failed to install grub. Quick workaround is that(if you burn iso in USB flash drive) go to pool/main/g/grub2-signed(in usb flash disk) and rename the deb file manually (add 64). Now boot from usb flash drive and run a disk check to be sure.