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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How to remove boot pause screens (black screen with cursor then purple then black with /dev/sda2: clean message) in new 16.04 install on new SSD

So this issue started the first time I fresh default installed 16.04 on my existing HDD... not duel boot, just Ubuntu (Erase disk, and install fresh). I was promted to turn off Secure Boot if I wanted ...
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Developped EDK2 Shim [on hold]

I have created a new version of the Shim. It's based upon EDK2 and now supports openssl-1.0.1e (included on the github page). Download: https://github.com/andyvand/Shim_EDK2 It's better than the ...
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0answers
55 views

Could not load vboxdrv in Ubuntu 14.04 (and I want to keep secure boot)

I encounter the exact same problem as here except I'm not able to recover using the proposed solution. Could not load 'vboxdrv' after upgrade to Ubuntu 16.04 (and I want to keep secure boot) ...
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1answer
97 views

How to reinitiate the disabling of secure boot [closed]

After installing Xubuntu 16.04 and updating the system for the first time, I saw a popup that recommended disabling Secure Boot. I chose to disable it and set some sort of a password. Then after ...
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0answers
8 views

WIFI doesn't work after update without secure boot off [duplicate]

I've just received big bunch of updates on my new laptop with pre-installed Ubuntu 14.04. Update asked me to turn off secure boot but I ignored it. After restart WIFI stopped working. Turning secure ...
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1answer
93 views

Can't login after update 14.04 Secure Boot

After applying an update I'm not able to login in graphics mode. The last update ask me about Secure Boot. Now I can only login in command line mode. In graphics mode it keeps me asking the password ...
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3answers
246 views

Is this how I tell whether or not I have “third party drivers”?

So installing updates on my 14.04 64bit UEFI system this morning, got these: Install: libefivar0:amd64 (0.21-1~14.04.2, automatic), mokutil:amd64 (0.3.0-0ubuntu3~14.04.1, automatic) Upgrade: shim-...
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45 views

Can't access Ubuntu after fresh installation - secure boot violation?

I spent hours trying to make my laptop working. I'm quite not-experimented but I usually find my way by trying out things I find on forums and websites... But this time, I can't seem to get through it....
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2answers
62 views

Laptop resolution lowered after automatic updates

I'm running Xubuntu 14.04 on a laptop with 1920x1024 native resolution. After the latest automatic update (including kernel upgrade to 3.13.0-92-generic), the maximum available screen resolution ...
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0answers
19 views

Nvidia 361 with Secure Boot enabled on Ubuntu 16.04 [duplicate]

Does any one know of any ways one could have Secure Boot enabled and still be able to get past the log in screen?
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1answer
63 views

Add Ubuntu EFI DB and PK back into UEFI

I reset my bios and now my Ubuntu 16.04 disk wont book because it can't find the Ubuntu secure boot keys. How can I add these back into my UEFI so it will boot? When I try to boot I get a message: "...
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1answer
287 views

Disable secure boot y/n?

I have windows 10 installed. Im trying to install ubuntu. Should i turn off secure boot or leave it on? What does it do?
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0answers
59 views

Replace Grub2 by W10(encrypted) bootloader on UEFI

I have two windows partitions, one of which is encrypted with bitlocker. Also I now added a third partition on which I installed Ubuntu. Unfortunately this gave me a cascading bootloader structure: ...
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0answers
174 views

Ubuntu 16: Software Updater issue - Secure boot password

Whenever I update VirtualBox or Nvidia proprietary drivers, I get the following error: After that, I needed to restart the computer or force to close the Software updater and execute sudo dpkg --...
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0answers
62 views

Nvidia drivers and UEFI working together [duplicate]

I have Ubuntu 16.04 and after enabling Secure Boot Nvidia drivers stops loading. Same is with VirtualBox kernel modules. When I try to force loading kernel # modprobe nvidia_361 modprobe: ERROR: ...
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1answer
927 views

Unable to disable secure boot with mokutil in 16.04

Problem, new in 16.04: When I run the command sudo mokutil --disable-validation to disable secure boot validation within Ubuntu, I am asked to type a password twice and then get the message ...
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0answers
102 views

Skip sign verification at module loading

With secure boot enabled, is there a way to load a custom kernel module not signed, or signed with an auto-generated private key? Trying to load my custom module, insmod exits with the error Required ...
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1answer
164 views

Troubleshooting Secure Boot

When trying to boot Ubuntu with UEFI Secure Boot enabled, I get the following error when loading GRUB: Boot failure : a proper digital signature was not found. One of the files on the selected ...
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0answers
731 views

Why was I asked to create a password in order to disable secure boot on initial installation of Ubuntu 16.04?

On initial installation of Ubuntu 16.04, I checked off "Install third-party software" and, underneath it, I was prompted to check off another option which would allow the OS package to automatically ...
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1answer
423 views

“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 ...
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3answers
4k views

Why do I get “Required key not available” when install DKMS modules or after a kernel upgrade?

When I try to install DKMS modules like VirtualBox, Nvidia, or Broadcom drivers, they do not install and I get Required key not available. This issue may appear after a kernel update as disabled ...
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2answers
3k 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 bios....
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6answers
15k views

Could not load 'vboxdrv' after upgrade to Ubuntu 16.04 (and I want to keep secure boot)

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 ...
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3answers
6k 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 (bcmwl-...
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0answers
53 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 ...
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2answers
113 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 ...
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1answer
147 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 ...
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0answers
117 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 isn'...
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1answer
65 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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1answer
117 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
91 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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1answer
457 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 ...
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1answer
383 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 ...
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1answer
115 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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3answers
5k 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 DENIED*?...
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1answer
93 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
229 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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1answer
55 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
138 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
96 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 “recommended.”...
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0answers
83 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
467 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
100 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
919 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
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1answer
121 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 ...
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1answer
31 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 ...
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0answers
296 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
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0answers
534 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
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2answers
799 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
154 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 ...