Can not install Ubuntu 12.04 or 12.10 on Toshiba qosmio x870. Please help!

Posted by Mighty on Ask Ubuntu See other posts from Ask Ubuntu or by Mighty
Published on 2012-11-30T14:04:23Z Indexed on 2012/12/01 5:20 UTC
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12.04

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12.10

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uefi

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windows-8

I have a new Toshiba qosmio x870 and for the past one week I have been trying to install Ubuntu 12.04 from a USB and Live CD without success. I keep on getting this error:

Boot failure: a proper digital signature was not found. One or more files on the selected boot device was rejected by the Secure Boot feature.

I even tried installing Ubuntu with the Windows installer. After installation and I reboot the PC, first I see the error that points to:

\ubuntu\winboot\wubildr.mbr
Status: 0xc000007b
Info: The OS couldn't be loaded because a required file is missing or contains errors.

When I restart, that the previous error doesn't show up and I see both Windows 8 and Ubuntu (happy that I was successful) but when I click on Ubuntu, it flags an error. This is the first time I'm having a Secure Boot-capable PC. What will be the danger in disabling the secure boot? I'll be happy if I can get assistance from anyone.

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