Secure Boot is an UEFI feature that blocks unsigned drivers and operating systems from running. Use this tag if you have questions about Ubuntu on a secure-boot enabled system.

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“Booting in insecure mode” when secure boot is turned on

I have a dual boot (UEFI) Windows 10 Pro and Ubuntu 16.04. During Ubuntu install IT asked me to turn off secure boot, so I did it, using the installer. When I finished installation, I turned secure ...
4
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2answers
282 views

Why do I get “Required key not available” when install DKMS modules in Ubuntu 16.04?

When I try to install DKMS modules like VirtualBox, Nvidia, or Broadcom drivers, they do not install and I get Required key not available. How can I fix it?
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1answer
466 views

secure boot issue : win10 & ubuntu16.04

I was asked to disable secure boot in order to install third party drivers on ubuntu 16.04. So I followed the instructions of MOK managemnt to disable secure boot. But secure boot is still on in ...
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votes
7answers
1k views

Could not load 'vboxdrv' after upgrade to Ubuntu 16.04

I upgrade from Ubuntu 15.10 to 16.04 and since then VirtualBox 5.0.18 isn't starting my VMs anymore. It complains that 'vboxdrv' isn't loaded. So I try to load it and get the following error: $ sudo ...
5
votes
1answer
657 views

Why disabling “Secure Boot” is enforced policy when installing 3rd party modules

When installing 16.04, I was asked to turn off "Secure Boot" if I wanted to install 3rd party modules/drivers. I did not comply. And when I installed manually the only 3rd party drivers I use ...
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0answers
27 views

Secure Boot failed Error at Booting

I installed WinUSB to create a bootable drive for another system. I restarted my Ubuntu 14.04 and it shows an error as "Secure boot failed operating system is invalid". I have installed just Ubuntu ...
0
votes
2answers
55 views

I can not boot ubuntu installation CD nor installation USB-drive with HP Envy DV6 notebook [duplicate]

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 ...
0
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1answer
124 views

ubuntu 15.10 installation UEFI problem

I have an ASUS n550-jk laptop and I wanted to install Ubuntu 15.10 alongside Windows 10 (with dual boot) with UEFI. After going to booting menu and choosing boot option (I tried both bootable USB and ...
0
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0answers
62 views

Windows RT and secure boot

I have read that it is not possible to boot another OS on the Surface RT(1G), because of the secure boot. But I also read that certain Linux OS can be booted even if there is secure boot. So why ...
0
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1answer
52 views

boot Ubuntu 14.04.3 problem from grub2

I have a problem installing Ubuntu 14.04 LTS on my ASUS Zenbook UX301LA-DH71T. The long story: I installed an older version of Ubuntu when I bought the Zenbook (I think it was a 12.XX version). I ...
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vote
1answer
69 views

With secure boot disabled, is there long term vulnerability to malicious code (on 14.10 and 15.04/Win multiboot setups)?

In a nutshell: is it really a good safe idea to leave Secure Boot disabled? I have two laptops with LinuxMint,Xuntu, Ubuntu 14&5 Win 10 and Win 8.1 between them. Grub 2 works fine with /,/boot ...
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1answer
70 views

Can I disable SecureBoot, even though my motherboard doesn't give me the option to do that?

It does not give me the option to run alongside windows during installation, tried to make Grub2 pop up manually, but it kept giving me an error. I run UEFI btw.
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0answers
160 views

Ubuntu: “Booting in insecure mode” with SecureBoot enabled

I have just installed Ubuntu 15.10, after having been with 16.04 LTS for some time to try it out. While I was using 16.04, I tried to install Nvidia Drivers and got told that I needed to disable ...
-1
votes
1answer
281 views

Installing Ubuntu 14.03 with UEFI

I'm trying to install Ubuntu 14.03 on my new Odys Trendbook 12. It came with Win 10 pre-installed. My problem is that I don't have the option to disable Secure Boot in the UEFI Settings. I created a ...
0
votes
1answer
87 views

Blank screen after installing ubuntu on flash drive and booting it from computer with Windows 10 preinstalled

After installing ubuntu on a flash drive and setting the bios to load OS from that drive, I boot to a blank screen. After a minute or so Windows will boot from the hard drive. I am working with an ...
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votes
3answers
2k views

How to fix Secure Boot error “Image failed to verify with *ACCESS DENIED*” on startup?

When I started up my machine this morning (I have Secure Boot and UEFI only enabled) I got this error (sorry for low quality image): What does it mean by Image failed to verify with *ACCESS ...
4
votes
1answer
84 views

Partial Upgrade removes signed GRUB EFI and breaks Secure Boot [closed]

Software Updater wants me to do a partial upgrade, and the list of changes shows that it removes the grub-efi-signed package and replaces it with the regular unsigned grub-efi. I tested this in a VM, ...
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0answers
215 views

Boot Ubuntu 15.10 on Surface Pro 3 from external SSD

I'm trying to get Ubuntu to boot from an external SSD on my Surface Pro 3. No luck so far. That's what I did: Flashed the image on a USB drive using Universal USB Installer Booted into the USB ...
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votes
1answer
50 views

Can I install Ubuntu on major OEM systems? [duplicate]

I want to buy a laptop and install Ubuntu on it. Most laptops these days are Windows 10 based, which require a UEFI secure boot, but don't require it to be unlocked. So I can imagine that most OEMs ...
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0answers
128 views

After Lubuntu 15.04 to 15.10 upgrade : Secure boot problem

I am on a Asus ROG G551. I upgraded a Lubuntu 15.04 (previously upgraded from a 14.10), to 15.10, after the upgrade it didn't boot anymore, Red Screen complaining about some "Secure boot" problem ...
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0answers
63 views

I am about to buy a new laptop to run Ubuntu. Will it boot on it? How do I check?

I have some questions regarding the statement below: Ubuntu’s boot loader isn’t signed with a key that’s required by Microsoft’s certification process, but simply a key Microsoft says is ...
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0answers
70 views

Asus N56J locked bios prevents me from installing ubuntu

Ive been trying to install ubuntu on my laptop for hours via disabling the secure boot option in bios with out success. Ive been getting the error 0xc000007b time and time again. ive tried the shift ...
3
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0answers
364 views

Enabling SecureBoot

I want to enable Secure Boot on my asus ux303ln laptop to enhance security. This means I do not want to use "shim" bootloader to be able to dual-boot into Windows, and I do want to have my own ...
0
votes
2answers
71 views

eufi\secure boot and auto booting into ubuntu after fresh install

i performed a fresh installation of ubuntu 14.04 amd64 from a usb device as my only operating system, on a new hard drive device. i've tried many uefi combinations after reading Installing Ubuntu for ...
3
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2answers
664 views

dual-boot with secure boot: invalid signature

So, I got this Dell Inspiron 15 laptop with Windows 10 a couple of months ago. I installed Ubuntu 14.04 to have as dual boot since I rarely use Windows. Today, I did an update and some grub related ...
0
votes
1answer
83 views

How to disable boot menu?

Sometimes, when I reboot the dirty way, I get a menu (black screen, grey letters) . This is asking to choose what/how I want to launch Ubuntu (very sorry I dont remind which modes). How is it ...
0
votes
1answer
30 views

Does the Dual-boot in secure mode works the other way?

Its a common error that users can't boot into Windows through Grub while using Secure-boot. Some "image not found" error comes up. Disabing secure-boot works though. That is when when we install ...
0
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0answers
260 views

Ubuntu 15.04 install freezes with “booting in insecure mode”

This is essentially the question Joao asked (How to solve "boot in insecure mode" error?), but I was not able to fix this issue on my laptop: I upgraded my 4 year old Acer Travelmate 8473TG ...
2
votes
0answers
498 views

GRUB not appearing after installing Ubuntu 15.04 on Windows 10 dual-boot

I have recently upgraded from Windows 8.1 to Windows 10. I tried to install Ubuntu 15.04 in dual boot configuration. PROBLEM: The system directly boots into Windows without the GRUB screen appearing. ...
2
votes
2answers
458 views

How to enable Secure Boot without issue?

I read here that it is essential to have Secure Boot enabled: However I find that when I enable Secure Boot, it changes it so that systems can boot with UEFI boot, but not Legacy, it also disables ...
0
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0answers
122 views

grub2 insmod Secure Boot

Will grub2 load signed grub modules when the system is set to Secure Boot? Where are signed grub modules? How can I tell if a grub module is signed? I have my system set up to boot Windows or ...
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0answers
52 views

How to sign bootloader.efi when private key is in HSM

Normally i use sbsign to sign .efi file when i can access my private key directly. But now we're using HSM, I can't access my private key as file, i only can tell HSM what to sign, and get the ...
2
votes
1answer
13k views

Windows 10 / Linux Dual Boot - Boot-loader Problems

I am currently running a dual boot of Windows 10 Home 64-bit and Xubuntu 15.04 64-bit on my machine. I have Windows 10 on an SSD, Xubuntu on another SSD and an HDD for storage formatted as NTFS (this ...
0
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0answers
128 views

reboot and select proper boot device or insert boot media in selected boot device ubuntu

This appeared after I replaced my windows 8 on my Toshiba satellite with Ubuntu 14.04.2LTS. What can I do??? I have tried everything, re-installing it, I have been trying using USB flash drive and CD, ...
2
votes
1answer
526 views

Can I reenable Secure boot after having installed Ubuntu 15.04 successfully next to Win 8.1?

The title is basically my question: I have (seemingly) managed to successfully install 15.04 next to the existing Win 8.1. I did this with Secure boot disabled to be on the safe side. can I now ...
0
votes
1answer
441 views

UEFI Dual Boot partitioning with 14.04 and Win 8.1 on SSD + HDD

I'm setting up a new machine with a SSD and a HDD. Windows is for gaming and Ubuntu for working. I'll install 8.1 first and leave 10GB on the SSD for /. On the HDD I'll leave 120GB for /home and the ...
0
votes
1answer
174 views

How to install ubuntu15.05 stand alone using UEFI mode and boot secure enable in lenovo flex 2?

I installed Ubuntu successfully using legacy mode but in UEFI mode I faced some problem. And Ubuntu boot loader asked me to create extra minimum 35MB space to EFI boot loader. I don’t know why? and ...
0
votes
1answer
122 views

Ubuntu 14.10 dual boot with preinstalled Windows 8

I wanted to install Ubuntu with my VAIO laptop with preinstalled Windows 8. So I downloaded the ISO image of ubuntu-14.10-desktop-amd64 and extracted to my USB drive with Universal USB installer. I ...
0
votes
1answer
38 views

ubuntu login from winwows 8.1

I have dual booted Ubuntu 14.04 with Windows 8.1. I restarted the pc with command shutdown -r now in Ubuntu Terminal. The PC restarted but now I can only access Windows and can't login to Ubuntu. ...
0
votes
1answer
5k views

How to use the Linux Foundation's PreLoader?

I read that there is another way than using shim and signed GRUB binaries for Secure Boot by using the Linux Foundation's PreLoader or Linux Foundation's Secure Boot System, but how do I use it? ...
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vote
3answers
7k views

How to solve “boot in insecure mode” error?

I'm trying to install Ubuntu 14.10 x64 on my laptop. But I always get "booting in insecure mode" message and then nothing happens. My laptop has BIOS Legacy not UEFI. There's any option about security ...
0
votes
1answer
1k views

No HDD in boot order in BIOS in Asus x555LA

Today I bought a brand new ASUS X555LA laptop with Window 8 pre-installed. So I tried to install Ubuntu 12.04 64bit using a USB flash drive. My first boot was USB (not UEFI) and I was successfully ...
1
vote
1answer
274 views

Ubuntu 14.04 On Asus Zenbook UX302LA

I have an Asus Zenbook UX302LA with Win8 pre-installed that I bought new in the summer of 2014. I now want to dual-boot it with Linux Ubuntu 14.04 (latest version I believe). I can get it to boot no ...
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votes
1answer
150 views

Want Ubuntu and Windows both on My Laptop

Some days ago i used Ubuntu 14.04 LTS for 2 weeks and loves it. On that time i had completely install Ubuntu on my laptop. Now the problem is i also has to developed .Net applications. So i need both ...
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0answers
6k views

Ubuntu on Surface RT?

A continuation of Can Ubuntu run on a Microsoft Surface with Windows RT? Regarding the Duplicate Votes: Technology has changed. Now that Ubuntu natively supports UEFI and Secure Boot, this ...
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2answers
13k views

Ubuntu 14.04 single-boot with UEFI-mode enabled

I recently purchased a Dell Vostro 5470 with a pre-installed Windows 8 OEM on a HDD 500GB. Now I'm trying to replace the HDD with a Sandisk SSD 240GB as my main disk (next step will be use the HDD ...
0
votes
1answer
178 views

No grub after switching to “boot in secure mode” (Windows8) after Ubuntu being installed

I installed successfully Lubuntu 14.10 alongside Windows8. Being tired of seeing "Booting in insecure mode..." as the PC turned on, I enabled again "boot in secure mode" from Win. As a result the Grub ...
0
votes
3answers
407 views

Need help in Installing Ubuntu on Laptop with Secureboot

I just purchased HP G049AU whose configuration is : - AMD A8 - 4 GB RAM I checked that secureboot is enabled. I want to completely remove Windows 8.1 with Ubuntu 14.04.1 I would like to know : Can ...
2
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0answers
78 views

How can I compile and sign Grub in a way that Secure Boot will allow?

Since the file .efi of Grub2 compiled by myself hasn’t gone through code signing (such as EV code signing certificate), and now my program (.efi file) can’t boot computers which have enabled Secure ...
3
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2answers
409 views

Grub Setup for dual Ubuntu under EFI

I have installed to versions of Ubuntu, one up-to-date Xubuntu and a 12.04.5LTS Ubuntu. I first installed Xubuntu and later Ubuntu. Since the 12.04 would not write a correct grub-conf on install (I ...