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I experiment with secure boot. I enabled it on Thinkpad X230 and could (and still can) boot Ubuntu 12.04.2 (64 bit) from USB stick. I then installed Ubuntu (left only the first NTFS partition with recovery for windows 7). Now I can't boot Ubuntu from my harddrive. Shouldn't I be able to boot Ubuntu? Any idea on how to use Ubuntu 12.04.2 with Secure Boot enabled? Do I encounter a bug or a feature?

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There is a Wiki here that might be able to help you. help.ubuntu.com/community/UEFI –  lordqwerty Mar 18 '13 at 21:45
    
Also what is the error you're getting? –  lordqwerty Mar 18 '13 at 21:45
    
I just see a boot menu with "ATA HDD0: Long Number". If I press [Enter], boot menu reloads. Thats all. The funny thing is: Ubuntu 12.04.2 should work with secure boot on (so I thought) and actually my USB version did boot. –  rootkid Mar 18 '13 at 22:00
    
Trying "boot-repair" now, maybe its a bootloader problem... –  rootkid Mar 18 '13 at 22:12
    
I would think it might need a boot-repair. I can't be of much help because I don't own Windows 8 but I do have experience with Apple Mac UEFI booting. –  lordqwerty Mar 19 '13 at 17:27
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