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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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  • I tried your solution but it does not work, I can't see my media. I have tried with a fedora 17 CD and it work but not with ubuntu – Ananta Mar 14 '16 at 18:59
  • does the boot menu options change? – cmks Mar 14 '16 at 19:01
  • Yes some number are added after the line like HDD 56465464 EFI – Ananta Mar 14 '16 at 19:03
  • And you USB drive is not shown? Did you try it at an other computer? Maybe the stick is not bootable? – cmks Mar 14 '16 at 19:07
  • The usb is not shown and I have try with my acer computer and it works with the acer – Ananta Mar 14 '16 at 19:09
  • If you want i could post 2 photos of the bios conf and bios boot menu – Ananta Mar 14 '16 at 19:14
  • If you need to enable BIOS/CSM/legacy support to boot a USB drive, then *DON'T! If the CSM is disabled, then that means that the currently-installed OS is almost certainly booting in EFI mode, and enabling the CSM runs the risk of creating a mixed-mode installation, which is a Bad Thing. If you want to completely replace* the current OS, though, that's not so important. – Rod Smith Mar 14 '16 at 19:17
  • I want to fully remove the current OS :) – Ananta Mar 14 '16 at 19:40