I am trying to install Ubuntu 12.10 64b on dual-boot with preinstalled W8.
I already burnt a bootable USB with ubuntu-12.10-desktop-amd64 and configured my BIOS (EFI, secure boot disabled) to boot from there.
I can boot from USB and test Ubuntu from the pendrive but Gparted shows the following error:
backup GPT table not at the end of the disk. This might mean that another OS believes disk is smaller . Fix by removing the bakcup to the end (and removing the old backup)
showing "fix", "cancel" and "ignore" as options.
I am unaware how to proceed in order to avoid messing things up with W8.
I also tried to install Ubuntu through Wubi which did not work either (but that is another help topic...)