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I've recently bought an Ultrabook with "Hybrid" HDD (500 GB) + SSD (32 GB) (Intel caching technology) that came with Windows 8 pre-installed in UEFI mode.

I wanted to dual-boot it with Ubuntu 13.04 x64, so I did the following:

  1. Disabled everything Intel-related on the BIOS and on Windows 8 (including Intel RST's RAID);
  2. Shrank Windows 8's partition;
  3. Installed Ubuntu's root (/) on the SSD, /home/ and swap on the HDD.

It worked fine like that. GRUB loaded on startup and displayed a list with a lot of *.efi files, two "ubuntu" entries, UEFI loader (something like that, I'm not sure) and Windows 8 UEFI. When I chose the first "ubuntu", it loaded up ubuntu, the second one loaded Windows 8, and "Windows 8 UEFI" entry didn't load.

I also wanted to re-enable the caching technology for Windows 8, since it's a nice feature. So, I went to the BIOS menu and set-up the Intel RST RAID. Now, I can't boot any system. Nothing shows up when I turn the computer on. It just displays a message telling me to install an operational system. I think the RAID screwed the UEFI boot-loaders (or something like that, I'm pretty newbie as you can tell).

So, my questions would be:

  1. Is my problem the boot manager?
  2. If it is, could I install rEFInd or GRUB to fix it? How?

Thank you for your time :)

share|improve this question
    
Ok, it seems that my EFI partition is now gone. –  r00t Aug 8 '13 at 22:04
    
What type of partition you're using MBR Hybrid or GPT? Also while you install ubuntu, have you install grub-efi-amd64-signed which support SecureBoot? –  number5 Aug 9 '13 at 5:46
    
Please indicate your Boot-Info URL ( help.ubuntu.com/community/Boot-Info ) –  LovinBuntu Aug 9 '13 at 22:57
    
I believe I installed SecureBoot support. This is my Boot-Info URL: paste.ubuntu.com/5972193 –  r00t Aug 11 '13 at 3:25

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