I installed Ubuntu 14.10 in VirtualBox with UEFI. But now I have rebooted this OS and now it boots into a UEFI Interactive Shell v2.0. How can I boot normally into Grub again?
I encountered the same problem and found that if I issue following command in the interactive shell, the virtual machine would boot into Ubuntu:
(Use backslash, forward slash does not work. Commands in UEFI interactive shell are case insensitive.)
My VirtualBox version is 4.3.20 r96997, Ubuntu version is 14.10 AMD64. I do not know why this happens and how to solve it. Just found this not elegant and still a little bit troublesome workaround.
Workaround in Update 1 failed. I turned off the virtual machine, launched it. And it booted into UEFI Interactive shell again. According to this, the problem was probably cause by a VirtualBox bug. I am still looking for further solution to this.
Finally found an solution. According to this, you need to create a startup.nsh script manually. Except for the method in mentioned post, you can also do this:
$ sudo mount /dev/sda1 /mnt $ cd /mnt $ sudo sh -c "echo '\EFI\ubuntu\grubx64.efi' > startup.nsh"
I had the same problem (with the EFI enabled because I couldn't get it to run otherwise). Strange; although installation of Ubuntu 14.04.2 got no error, installing Kubuntu 15.04 failed to finalize. It froze at the very end when asked to remove DVD. After reset, it booted fine but after power down it brought up shell.
So, to avoid shell type:
and on the opened window add these 2 lines:
press Ctrl + s and Enter to save and Ctrl + q to quit. Then restart VM.
Alternatively, you can always use these 2 lines to exit shell and boot OS. But second time you restart you will be in a shell again and to avoid it edit
Another option is to un-check the Extended Features option called 'Enable EFI' under 'Motherboard' for your VM.
Had this issue come up for Gnome Ubuntu 12.04.2 amd64bit installation.
Discovered this after having to change settings for hardware acceleration. I was left with having VT-x/AMD-V, Nested Paging enabled. My VM has 2 CPUs, 8GB RAM for reference.
After un-checking the issue is completely by-passed Gnome Ubuntu boots up no issues. Running Virtual Box 4.3.18 r96516 on Windows 7 64-bit Host.
VirtualBox use that
bootx64.efi to boot.
Ref.: Archlinux Virtualbox wiki
I could solve this issue by changing the cdrom device within virtualbox from IDE to SATA. I removed the standard mapping of the virtual cdrom drive within the device configuration.
Simply add a cdrom device to the existing SATA Controller which is to be used for your installation media.
Et voila, no further problems with EFI.
for this you need to write it like the following:
fs0: cd EFI cd ubuntu grubx64
this is how i got it to work if you write it any other way it wont work.
Another work around:
In the uefi shell, boot temporarily in to ubuntu using:
fs0: cd EFI cd ubuntu grubx64
Then, inside ubuntu, edit startup.nsh file like below:
Open terminal Ctrl+Alt+T.
sudo nano /boot/efi/startup.nsh
Enter your password.
Now delete all that is in there using del or backspace key.
Then type this exactly: (
FS0- that is the numeral
0, not the alphabet
Now press Ctrl+O (That is alphabet O).
Then, Alt+D (To change text to msdos format).
Everything should be fine now.
Using Ubuntu 16.04.4 with EFI enabled and while starting the virtual machine I found that it won't boot and just stay in the EFI interactive shell.
This is how I fixed the boot:
First, I found that the grubx64.efi is located in BLK2, so for a one time boot I just typed the following in the interactive shell:
And viola, Ubuntu is up and running.
I order to permanently fix this issue, once the system was up I echoed the following line into /boot/efi/startup.nsh.
sudo echo 'BLK2:/EFI/ubuntu/grubx64.efi' > /boot/efi/startup.nsh
That's it, the system will boot correctly.
After installing Kubuntu15.10 in VirtualBox5 with UEFI, the reboot of the VM fails.
Adding the line
FS0:\EFI\ubuntu\grubx64.efiin the UEFI-Shell doesn't help.
And the solution with creating a new startup.nsh file in Kubuntu15.10 in the chroot environment with
sudo echo '\EFI\ubuntu\grubx64.efi' > startup.nshgives also no improvement.
I found the solution:
The problem was, that the directory /boot/efi/EFI/ubuntu with the file grubx64.efi doesn't exist.
After booting a Live-CD and changing to the chroot environment, I installed the missing packets and create the needed NVRAM entry with:
sudo apt-get install grub-efi-amd64-signed shim-signed sudo update-grub
For defining or change of efi boot directory need to first run this command. This solved my problem.
sudo grub-install /dev/sda --target=x86_64-efi --efi-directory=/boot/efi/
/dev/sda is the system hard disk.