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I recently bought a Toshiba Satellite P50, I tried installing Ubuntu 12.04.3 and 13.10 alongside Windows 8.1.

If I disable Secure Boot, but leave the UEFI mode on, I can get to the screen that asks If I want to try Ubuntu. When I select that option the screen just goes black and nothing happens.

I'm only able to load Ubuntu from a usb when the Secure Boot and the UEFI mode are both enabled. But, after I install it, the computer loads only into Windows. I ran the boot-repair after from the usb, after disabling Secure Boot, and it told me that I should disable Secure Boot, but when I did I was again unable to load it from the usb.

Thanks for taking the time to read this. Any help or suggestions with would be greatly appreciated!!

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marked as duplicate by Thomas W., Eric Carvalho, Braiam, karel, Seth Dec 18 '13 at 21:40

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Several suggestions here. Seems to be an issue with NIC but then you will only have wifi. Toshiba Satellite P50 model number: P50-A-01E Haswell processor – oldfred Dec 18 '13 at 5:30

If you did your install while secure boot was enabled, need to run boot-repair while secure-boot is enabled.

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Thanks for the quick response. If do that, will it set up the GRUB bootloader with secure boot? My concern with running the boot-repair on secure boot was not being able to get back into windows after. – user226538 Dec 18 '13 at 3:47
It will likely auto-detect windows and add a boot option form the Grub2 menu (I'm not sure I never set up windows). If not, no worries as Ubuntu's UFEI won't overwrite Windows UFEI informaton, so you'll still be able to select the UFEI Windows loader. – virtualxtc Dec 18 '13 at 3:51

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