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I installed Ubuntu on 12.04 on my Samsung laptop alongside Windows 8. To install Ubuntu I disabled the bios security and enables CSM OS.

The installation went fine and Ubuntu works great. The problem is that when from the grub menu I select Windows 8 or Windows 8 recovery it doesn't load anything.

If I in the bios I enable the Secure OS option than I don't get the grub menu, but Windows 8 detect some error and after a while loads fine. Disabling again the Secure OS option in the bios, I get the grub menu and Ubuntu works fine.

What can I do to fix this and normally dual boot either Ubuntu or Windows?

Thanks a lot in advance, Luca

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What is CSM OS? –  user25656 Jan 16 '13 at 17:22
    
have you tried - help.ubuntu.com/community/UEFI –  Web-E Jan 16 '13 at 17:23
    
I'll try to use boot-repair and let you know, thanks! –  lucacerone Jan 16 '13 at 17:52
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Ok the boot-repair option seems to have fixed it. There is only one thing I can't understand, now in the grub menu there are a lot of entry that I can't fully understand like: some .efi and .bkp locations... –  lucacerone Jan 16 '13 at 18:12

1 Answer 1

up vote 3 down vote accepted

Luca Cerone fixed the issue in a comment.

Ok the boot-repair option seems to have fixed it. There is only one thing I can't understand, now in the grub menu there are a lot of entry that I can't fully understand like: some .efi and .bkp locations...

Luca Cerone Jan 16

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