Ubuntu 12.04 LTS installation crashes with grub installation error ( UEFI and GPT partition type)

[Blackbug]

I have windows 8 as default OS on my HP machine..It came preinstalled..I have UEFI firmware, and the hard disk partitions are of GPT type. I disabled the secure boot, enabled legacy boot, and tried installing 64-bit 12.04 LTS..however, the installation crashed at almost the end, with an error : "unable to install grub in target".

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: ubiquity 2.10.29 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 3.11.0-15.25~precise1-generic 3.11.10
Uname: Linux 3.11.0-15-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
CasperVersion: 1.315.1
Date: Fri May 30 19:43:50 2014
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed cdrom-detect/try-usb=true persistent noprompt floppy.allowed_drive_mask=0 ignore_uuid boot=casper only-ubiquity quiet splash --
LiveMediaBuild: Ubuntu 12.04.4 LTS "Precise Pangolin" - Release amd64 (20140204)
MarkForUpload: True
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 LANG=en_US.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)