I have just tried installing Ubuntu 11.10 on a newly bought Lenovo ThinkCentre Edge with EFI boot enabled. The machine came preloaded with Windows 7. I first opted to install Ubuntu 11.10 side-by-side with Win 7. Installation of Ubuntu finished with success, however, when I rebooted, it kept booting Windows. I could not make it boot Ubuntu.
I then reinstalled Ubuntu 11.10. This time I opted for the Use Entire Disk option and thus wiped Windows 7 from the machine. Hoping this would work, I was surprised to see that it still did not work. Even though the installation process went without any problems/errors, when rebooting it now just gives me "No bootable operating system. Insert bootable disk and press any key..."
I figure this is because of EFI. I have checked the System Setup (F1 during POST) to find a BIOS option to disable EFI/UEFI boot, however, there is no such option for this machine.
So my question is, how do I install Ubuntu on a machine with EFI?
- Or, since Ubuntu is probably already installed: how do I make it boot Ubuntu?
I went and bought a CDROM and installed Ubuntu from it. That made it work. Appearently, the Ubuntu ISO is broken in such a way that installation from USB does not work on (at least some) EFI systems.