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Hello two weeks ago I uninstalled windows 10 and installed fedora 23 using a USB drive created by win32diskimager.

My notebook : HP Envy dv6 current OS : fedora 23

Fedora 23 have some bugs with my computer so I decided to give ubuntu a chance.

However I cannot boot from usb or CD/DVD for the installation. I have make some research and changed the boot order I have activated the legacy mode and deactivated the secure boot option but it still does not work.

I have not the option to boot from CD/DVD not from an USB drive in the F9-bootmenu

I have:

HDD EFI
BOOT FROM EFI FILES (In this menu my CD or USB is visible)

But I have already installed an OS (fedora 23) with a bootable usb drive on this pc but it doesn't work anymore.

Could you please help me? :)

ps : i'm french, sorry for the mistakes :).

cmks
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Ananta
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2 Answers2

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Chances are your USB flash drive was prepared incorrectly. There are several programs that can be used to create USB flash drives from .iso files, and they don't all work perfectly, especially for EFI-bootable systems. Based on posts I've seen, Rufus seems to be the most reliable and Pen Drive Linux/YUMI is useless for creating EFI-mode disks. See these comments of mine for more details on my own experiences with several tools.

You could also try using the "BOOT FROM EFI FILES" option you mention. Once you select that option, you should see a primitive file selector. (Details vary from one EFI to another.) Browse to your boot medium and find the EFI/BOOT/bootx64.efi file and launch it.

Rod Smith
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I guessing the fedora installation image on the usb drive was an UEFI compatible image, the ubuntu one may not.

Try to find an option in the BIOS settings to boot legacy devices. It may called "legacy mode" or "CSM mode". Maybe there is an option to deactivate UEFI.

After enabling CSM or legacy mode or respectively disabling UEFI you should can boot the ubuntu installation media.

cmks
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