View Full Version : [SOLVED] [BOOT] Problem on install Ubuntu 14.04 and Windows 8.1

November 21st, 2014, 08:43 AM
Hi all,

I have a Toshiba SATELLITE L50-A-1EL notebook with pre-installed Windows 8.1 operating system. I'm trying to install Ubuntu 14.04 on it but I fail.
I disabled the Secure Boot option in BIOS and disable the "fast boot" on Windows 8.1 (enabling complete shutdown of my notebook).

With a DVD/USB image of Ubuntu 14.04 in my notebook I'm able to get the (EFI) GRUB loaded at start-up and I can chooce to start the operating system
(the BIOS is configured with UEFI support).

After that, the screen of my pc became blank and it seems to be freeze (it doesn't respond to any pressed key); I can only reboot the notebook.

I try to disable UEFI support in BIOS (the other choise is CMF) and I got the standard ubuntu installation mený (the NON UEFI installation mený). The system starts correctly and I'm able to install Ubuntu in legacy mode (but the bootloader is installed in /dev/sda partition and not in /dev/sda2 where is locate the EFI boot).

With this configuration I'm able to start Ubuntu if my BIOS is set-up in legacy and Windows 8.1 if my BIOS is set-up in UEFI mode.

At start-up I can't choose Ubuntu or Windows at the same (because the legacy grub see only Ubuntu and UEFI see only Windows).

- how can I solve this issue?

Best Regards.

November 21st, 2014, 01:55 PM
I'm not sure how to remedy your situation as I don't use UEFI myself. From everything I have read, if windows is installed in UEFI mode then you must install Ubuntu UEFI or the result will be what you get. Either one or both systems unbootable or you need to make the change in the BIOS on each boot. You need to find the option to install Ubuntu in UEFI and then it will put its efi files on the same partition on which windows has its efi files. You might read the link below?


November 21st, 2014, 06:16 PM
Be sure to fully back up Windows and make a Windows repair flash drive.
Use Windows to shrink its NTFS partition and immediately reboot so it can repair to its new size. May sure fast boot is still off as Windows likes to reset to its defaults.
Do not create any partitions with Windows.

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November 22nd, 2014, 07:36 AM
Hi all,

using an Gnome Ubuntu USB image I was able to install linux on my notebook. Now I have a problem. At startup the grub loader is not called but Windows is started. I created a rFind USB image and running it at start-up I saw the ubuntu entry. Selecting the EFI entry I got GRUB menu and selecting UBUNTU I can enter in my installed ubuntu o.s. (now I'm writing ith linux).

- how can fix my siituation to run GRUB at startup and not use every ttime the USB flash with rFind ?

Thanks a lot.

November 22nd, 2014, 07:46 AM
You could use efibootmgr to add a nvram boot entry for Ubuntu if you don't already have one. efibootmgr can also change the boot order, so grub is first (since it might be present, but not in first boot order). If present, you should be able to select it with the function key at power on (varies by machine) to select ubuntu, or maybe hdd then ubuntu.

November 22nd, 2014, 04:38 PM
I think Toshiba's also need one of the work arounds.


Most seem to use this option if dual booting. In efi partition:

Rename /efi/boot/bootx64.efi, copy shim or grub into /efi/boot and name it bootx64.efi
Then boot harddrive entry in UEFI menu. You should be able to set it to default in UEFI or with efibootmgr.

If grub has a major update you may have to copy the newer grubx64.efi again.

November 25th, 2014, 10:11 PM

I will try one of the work-around that you suggest me.

November 26th, 2014, 12:50 PM
Hello everyone, I am able to solve my problem following the instructions in:


Thanks a lot.