Questions tagged [secure-boot]

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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Boot failure after using 4k Grub theme on Ubuntu 18.04

I have downloaded and installed the wrong version of this grub theme. here is the ref if you wish to inspect their code https://www.gnome-look.org/p/1307852/ It should be (1080p) not 4k. As the result ...
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How to enter secure boot password on remote machine?

I am trying to disable/bypass Secure Boot on Ubuntu Server 18.04 to use Wireguard. Unfortunately, my machine is remote and headless, meaning I cannot access it until the boot-up process is finished. ...
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What has changed in Ubuntu 20.04 with regards to lockdown?

The release notes for 20.04 state that the new 5.4 kernel has: Enablement of lockdown in integrity mode. What does that mean? What has changed? In 18.04 lockdown was already enabled for systems ...
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Installing VBox in Ubuntu 18.04 with secure booth enabled in dual boot machine

Sorry if this is obvious but I'm a beginner and don't want to mess it up! So I have a machine with dual boot Ubuntu 18.04/Windows 10 and secure boot enabled. The secure boot is not optional so ...
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66 views

Ubuntu 20.04 black screen despite updates

I have installed the distro 20.04 before several months, it was working fine. Before one month I have updated it through the updater, and then, when I rebooted and then, there was a black screen with ...
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What to do if i skipped mok management twice?

system info - Linux xxxxx 5.4.0-28-generic #32-Ubuntu SMP Wed Apr 22 17:40:10 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux. grub 2.04 I did the typical sudo apt update && sudo apt upgrade ...
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40 views

Failed to set MokListRT: out of Resources : import_mok_state()

I'm facing a huge problem with MOK manager. After a install Ubuntu 19.10, with third party drivers install enabled, I rebooted the system. On boot, MOK manager was launched normally, but accidentaly I ...
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18 views

3rd Party Repos and Secureboot

I have a question relating to the installation process. I'm using an AMD GPU and Intel Wifi card but I would like to play H264 videos so I am assuming enabling the third party repos shall be required....
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35 views

Accidentally skipped MOK manager screen after being told to set up secure boot password

I attempted to install a dkms file through the terminal, but was told to set up a secure boot password. After doing this, the file installed seemingly correctly. During the set up, I was instructed to ...
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16 views

Use shim with custom key on a removable drive

I have made a Pendrive with an installment of ubuntu(19.10) in UEFI mode, and I was trying to make it work with secure boot. I properly installed rEFInd with a shim and custom key, and it works fine, ...
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install virtualbox 6.1 on 19.10 with secure boot

I installed virtualbox 6.1 on a freshly installed ubuntu 19.10 with secure boot enabled. Even the kernel driver was installed with the MOK utility, asking me for a one time password. Yet I missed to ...
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Cannot Access Windows after Ubuntu uninstallation

So, I deleted/uninstalled Ubuntu using the default disk partition tool in Windows 10 and now am stuck at the GNU Grub Version 2.02 Minimal Bash like..... I must point out that I Disabled Secure boot ...
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Ubuntu 18.04.4 live usb won't boot

PC: Dell Inspiron 15 7000 gamin Proc: Intel i7 4-core GPU: Nvidia gtx 1060ti Uefi Mode: ON Secure Boot: ON Current OS: Windows 10 Home My live usb won't boot after choosing any options like try ...
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No wifi drivers being installed on Acer Nitro 7

I have a brand new Acer Nitro-AN715-51, which shipped with Windows 10 and - unfortunately - Microsoft Secure Boot. Installing 18.04 LTS itself off of a USB stick wasn't a problem, but now the ...
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I have a problem while installing the Virtual box in Ubuntu 18.04 with dual boot UEFI secure boot

Kernel driver not installed (rc=-1908) The VirtualBox Linux kernel driver is either not loaded or not set up correctly. Please try setting it up again by executing '/sbin/vboxconfig' as root. If ...
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/dev/sd1: clean…blocks…pops up on a black screen and just loops i cant login

I tried to change my login background using the code below in the terminal and I saved it. Then I clicked restart. lockDialogGroup { background: #2c001e url(file:///usr/share/backgrounds/drawing.png);...
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Should Ubuntu be installed in UEFI mode?

Ubuntu supports UEFI and Secure Boot, but it's unclear if they should be used. From my reading, it seems that using UEFI improves security, but the Ubuntu UEFI documentation says: If you're ...
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Trouble: No space left on device

I run into serious problem this morning. I remotely connect to my Ubuntu desktop in the lab via Teamviewer to finish training a machine learning model and present some results to my supervisor in the ...
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How do I make a Windows 10 Recovery Live USB that can boot from Secure UEFI containing file size over the FAT32 limit on Xubuntu?

Update 3 The latest ISO file size (November 2019, 1909 build) is greater than my 2 brands of burnable DVDs that can only handle 4.7 GB. From my research knowledge. UEFI will only show bootable USB ...
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1answer
178 views

No WiFi after MOK setup. Disabling Secure Boot does not fix

I'm running Ubuntu 19.10 (and using Cinnamon) on a Lenovo Thinkpad Carbon X1 Gen 7. I installed Virtualbox, which set up an MOK password after detecting Secure Boot was enabled in my BIOS. After ...
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55 views

How to make grub menu appear instead of booting directly to windows 10

HP Envy X360 with SecureBoot/UEFI boot loader I ran boot-repair from USB stick Tried to change boot order in BIOS (I see both Windows and ubuntu but cannot select and save ubuntu) With F9 at boot I ...
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'Boot Device Not Found' after installing an SSD with Ubuntu on my laptop

UPDATE: FIXED AND SOLVED All it really took was switching the Legacy Mode on and the OS booted up just fine. Cheers! So the HDD on my laptop died and I was told to replace it. I brought my old SSD, ...
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190 views

Trouble installing Nvidia drivers because of the disabled secure boot

I need to update my Nvidia drivers in Ubuntu 18.04.3 LTS, but while installing drivers using below command $ sudo apt-get install nvidia-driver-410 I am getting this message ... Secure Boot not ...
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1answer
227 views

Missed UFEI screen for virtualbox on boot, how to get it again?

I installed virtualbox using the official instruction on the oracle virtualbox website here: https://www.virtualbox.org/wiki/Linux_Downloads I followed the method of adding the package source to my ...
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37 views

Booting in insecure mode message despite secure boot being enabled

I don't really know where I messed up with my system, but since the past few hours I've been getting this message on booting up my laptop. This started happening after I disabled secure boot using: ...
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281 views

Secure Boot & MOK problem, after motherboard change, Ubuntu 19.10

I was required to replace the motherboard in my Toshiba laptop, due to a bad ethernet port. Secure boot was enabled at first boot, and my syslog got bombed with invalid Secure Boot password error ...
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200 views

How do I disable secure boot in Ubuntu 18.04 LTS (Windows 10 Microsoft store version)?

I'm running Ubuntu 18.04 LTS from the Microsoft store on my Windows 10 machine and trying to install CUDA on it. Along the installation process I get the following error: Executing NVIDIA-Linux-...
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67 views

Secure boot interfering with my NVidia GTX 1050Ti graphics driver

My laptop has a GTX graphics card, which had driver related issues while installing Ubuntu (alongside Windows). I had to use the parameter nouveau.modeset=0 while booting Ubuntu for the first time, ...
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1answer
44 views

Customizing Ubuntu 18.04 for protecting data

Is there any way to display and give access to only the browser on Ubuntu 18.04? I want the whole system to be protected and my use case anyway needs only the browser. To give a clear picture, I want ...
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1answer
97 views

I disabled secure boot and I get an error message when I boot. Ubuntu 19.10. This is the error generated after updating the kernel

My Ubuntu19.10 shows the following prompt when booting,I'm looking for a solution, my PC works,I just don't want to see an error,If you have encountered a similar issue and have already resolved it,...
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79 views

Installing Ubuntu on a Chinese Zentality - Zen Pro laptop

I need to install Ubuntu 18.04 (or any other doesn't matter) on my Chinese laptop and it's starting to look impossible to me. I hope someone is able to help me do that. Device Brand: Zentality - ...
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1answer
411 views

What motherboards support managing secure boot with mokutil? [closed]

I'm running a dual boot (Linux and Windows 7) on two separate disks, with grub2 as the bootloader. I've spent many hours over the past few months trying to find a way to enrol keys and sign modules ...
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297 views

How can I turn on secure boot after installing Ubuntu with secure boot off?

When I install the Ubuntu 19.10 I cannot turn on secure boot when I boot from the USB key which contains the installation medium (because I used grub2 to chain-load the Ubuntu live cd). After than I ...
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1answer
33 views

Quick boot but 25s from login to desktop

I recently bought a PC with Windows and set up a dual boot with Ubuntu and grub as a boot loader. Then I started looking for a way to customize grub and ended up setting up Refind. I ran into some ...
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1answer
1k views

How to install virtualbox on Ubuntu 19.10 (secure boot not enabled)?

I am trying to install virtualbox on Ubuntu 19.10. According to this page, the VirtualBox bug about secure boot driver signing has been fixed in version 6.0 for Ubuntu. However, I have not secure boot ...
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73 views

sbsign: sign a non EFI kernel

The following link explains how to sign a kernel module: https://ubuntu.com/blog/how-to-sign-things-for-secure-boot sbsign --key MOK.priv --cert MOK.pem my_binary.efi --output my_binary.efi.signed ...
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1answer
717 views

Device for Bootloader installation Dual Boot

I am planning to dual boot Ubuntu Budgie and Windows 10 on my Dell Inspiron 7591. It has a 512gb ssd with Windows 10 installed. I plan to buy another 512gb ssd and install ubuntu there. I just want to ...
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1answer
200 views

Login loop after disabling secure boot

I tried disabling the secure boot (to solve an error message from VirtualBox) with sudo mokutil --disable-validation(as per method 2 on the Ubuntu wiki). After rebooting I am stuck in a login loop. If ...
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317 views

General usage Thunderbolt3 ubunutu 19.10

I do have a Razer Blade Stealth, Razer Core2v, the Core2v conects thru Thunderbolt3 do have a PCIe eGPU, and USB3 ports and also a Gigaethernet NIC the eGPU works if I turn off Thunderbold Security ...
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2answers
716 views

CPU running much harder/louder after software update

I am runniing Ubuntu 18.04.3 LTS on a dual boot machine, the other/original partition is Windows 10. I just ran "Software Updater" as I've been getting some notifications to do so for about a week ...
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1answer
189 views

Ubuntu can't boot with secure boot disabled

I'm using Ubuntu 18.04 and it works fine with secure boot on. However when I disable secure boot, Ubuntu can't boot. It get stuck on the purple screen with the Ubuntu logo and white dots. As ...
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84 views

How to import own, enrolled MOK key into dpgk and dkms

I have Ubuntu 16.04 with secure boot and own MOK key enrolled in the firmware. Every time when performing kernel upgrade, dpkg --configure wants to create and enroll a new key and automate the signing ...
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530 views

Looking for a mokutil workaround to sign virtualbox kernel modules [closed]

I've been having some problems managing the Secure Boot setup on my machine which has an Asus X99 motherboard. I've successfully generated a MOK with openssl, and then used it to sign the kernel ...
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1answer
477 views

EFI Lockdown, Can't Boot Ubuntu 16.04 or Windows 10

I have a laptop with a 250 GB SSD containing EFI copies of Windows 10 and Ubuntu 16.04, and a 1 TB HDD with a couple data partitions. I had been using this system with both Secure Boot and Fastboot ...
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66 views

Nvidia driver does not load even with Secure Boot disabled

I have a Kubuntu 18.04 installed and I've been playing around with my Nvidia driver (I confess). By that, I mean that I had Nvidia driver 430 installed and working completely. But then since I could ...
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78 views

install all third party application with dual boot

I have freshly installed ubuntu 18 in dual boot windows 10 with secure boot enabled. Because of this the third part software (wifi graphics driver) didn't installed , as I have choose third party ...
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313 views

Shim UEFI MOK management countdown key press ignored

I have a system with Windows 10 with UEFI, and secure boot enabled. I have installed Ubuntu 18.04 in a dual boot configuration. I installed a driver in Ubuntu which required setting up of an MOK and a ...
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1answer
444 views

Pop OS theme for Ubuntu 18.04 boot problem

I installed Pop OS theme for Ubuntu. As a result the PC doesn't start except with Secure Boot disabled. Why doesn't it start with secure boot Secure Boot enabled? sudo add-apt-repository ppa:system76/...
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289 views

Ubuntu does not start after a skipped Mok management blue screen

The system update was running. Suddenly, a dialog box appeared to ask me for a password that I had to type twice. After that, System Update stated that a reboot was requered in order to complete ...
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86 views

Accidentally skipped mokmanager while installing Nvidia drivers with Secure Boot in 18.04

I tried installing nvidia drivers through the GUI in Ubuntu 18.04 (Software & Updates tool). After asking for my password and taking some time (presumably for installation/configuration), it ...

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