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It turns out accessing EFI on "Windows 8 hardware" car reorder the boot sequence. I solved my problem by reinstalling Windows 8 (settings > general > re-install windows) and then Ubuntu.


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You can't 'convert' Ubuntu to UEFI. It is already installed in UEFI mode, because the uefi bootloader uses an EFI partition (as well as Windows, too). In (old) BIOS mode there is no need for an EFI partition. Legacy bootloader seems to be kinda backup boot mode, in case efi bootloader got corrupted.


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Eventually I found the answer: if you do not have one already, create a live CD or USB drive and plug it in your computer. Keep your BIOS settings on UEFI boot, and when the Logo comes up, press the key that makes your computer show the boot order menu. For my Toshiba Satellite C55 it was F12. Changing the boot order in the BIOS would not let me boot my ...


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Please see the following questions and answers: Windows 8 removes Grub as default boot manager Dual Boot with Windows 8 UEFI - Ubuntu/GRUB Being Bypassed Windows 8 deletes GRUB when booting In particular, try EasyUEFI, referenced in my answer to the first question, from Windows. If these tools don't work, please run the Boot Info Script. This will ...


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I've been working on a Xubuntu based distro with a patched kernel integrating Realtek 8723BS WiFi card drivers, and both 32 and 64 bits EFI enabled, among other things. XJUbunTAB Hope you find this useful


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That's unfortunate pal.. Looks like Ubuntu's bootloader has been removed from the Master boot record. You can try this out Disable Fast Startup, and shut down your computer then boot up again. Try booting using a Live CD and go to Terminal & reinstall grub for your drive in this way from the Live CD sudo grub-install /dev/sdX where X is the letter of ...


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Grub should be able to do this, but you didn't tell it to look for your Windows installation before rebooting. Fixing your MBR caused it to forget your Ubuntu, so in some sense you're starting over from the beginning. I recently did an alongside install with Windows 7 and got it working, but I don't have UEFI. Did you do grub-install and grub-update ...


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From yr log it seems that there is a conflict between the way you installed Ubuntu (as if yr existing hw context was BIOS-MBR) alongside a Windows 8 system that is UEFI-GPT based. Your best solution, if yr install of Ubuntu is very recent and you have not invested hours and hours of configuration in it, would be to start again fresh from yr pre-installed ...


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this is simple, you may use easyBCD on windows and set only one boot entry for windows and then you use the disk manager from windows to format the ubuntu partitions. or, you reinstall windows and then you format the Ubuntu partitions from the disk manager in windows.



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