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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Ubuntu 20.04 usb only boots in legacy mode

I created a bootable ubuntu 20.04 usb using gnome disks (I am running fedora 34). When I go to my bios the usb drive appears as UEFI usb sandisk but it will only boot from the usb if I enable legacy ...
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System boot order not found. Initializing defaults

I've installed Ubuntu 20.04 LTS with a USB stick. Earlier I booted the USB stick in GPT partition scheme, and in my bios, boot option is set to UEFI without CSM. My installation was successful. Then ...
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Why does shim/mokmanager allow to circumvent _ALL_ protections of SecureBoot? And how to fix it?

Here is what I have done: Generated my own SSL keys (db, KEK, PK) x (cer, key) Removed existing signatures from kernel, GRUB, shim (and all other EFI binaries in /boot) and signed them with my own ...
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How to ensure that my computer/laptop has a legitimate and not tampered uefi/bios

How do I verify that a pc/laptop has a legitimate and not tampered uefi and/or bios? Let's say I was doing somethings which potentially could be dangerous. I have inserted some unknown hard drives or ...
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How to create a secure boot enabled USB flash

I want to create a Ubuntu bootable USB flash and install my apps in that, then pass USB to any other person. they should run Ubuntu from USB flash and run my applications from it, so that nobody could ...
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Problem with booting Ubuntu from USB

I'm having trouble booting Ubuntu from USB. Whenever I want to run Ubuntu I have the message "You need to load kernel first". Secure Boot is disabled. Can it be repaired?
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Ubuntu not booting after disabling secure boot

I am trying to install nvidia GFX driver on Ubuntu 18.04 LTS. During installation I was asked to set a pasword which will automatically do required manipulations for secure boot through MOK key. I did ...
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How to get Wi-Fi on Ubuntu with secure boot enabled? [duplicate]

I have installed Ubuntu 18.04 along side windows 10 on HP desktop. The Wi-Fi of the system works well on windows 10 , but on Ubuntu 18.04 it shows no wi-fi adaptor found. After going through internet ...
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Disable Secureboot in Quectel SC600T

I have applied secure boot on my Quectel SC600T EVM Board with security Key. now I have to disable secureboot. Is it possible back to convert from secure boot to normal boot? Is there any way to erase ...
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“System BootOrder not found. Initializing defaults” only when external USB hard disk WD My Passport is plugged in

I have a dual-boot Ubuntu 20.04 and Windows 10 system with Secure Boot enabled. Everything works fine except when I power it on with my external USB hard disk drive connected. It's a 4TB WD My ...
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Ubuntu Desktop 20.04 LTS Freezing After Connection to Internet

I can't move my mouse or click on anything, literally everything freezes. This is after connection to internet after I disabled Secure Boot to get my wifi drivers to work (Realtek). There's a video ...
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After installing Ubuntu, how does MOK pre-install the Ubuntu certificate by default?

When I installed Ubuntu, I found that the canonical certificate was embedded. I know a way to use using mokutil to import the certificate requires restarting and entering mmx.efi for confirmation. How ...
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Hibernate install failed - v20.04 EFI cannot boot into graphical mode - Secure Boot

I installed Focal Fossa 20.04 LTS on a new second SSD. The first SSD has Windows but that was unchanged, the Linux boot loader is installed on the second SSD together with Ubuntu. So each OS is self ...
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Ubuntu UEFI Secure Boot - what if the MOK certificate expires

Introduction I've enabled a secure boot for my Ubuntu 20.04 as it was a mandatory step when installing a kernel module the (apt install v4l2loopback-dkms v4l2loopback-utils). All went automatically ...
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Easy way to use TPM for encryption single sign on (20.10 Desktop)

I was wondering if there is an easy way to use encryption with Ubuntu 20.10 whilst utilising a TPM and Secure Boot for single sign on to the OS. Currently I have my PC (HP ProBook 650 G3) encrypted ...
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Error when booting Kubuntu after installing Nvidia drivers

I was installing Nvidia drivers and it asked me to enter a secure boot password. I entered it and restarted. I then continued with the first choice in the MOK GUI and now my system won't start. https:/...
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No wifi in dropdown options

I am getting this: Failed to Set MokListRT: Invalid Parameter Could not create mokListRT: Invalid Parameter Importing MOK states has failed: import_mok_state() failed: Invalid Parameter Continuing ...
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Install of 20.18 from usb fails /casper/vmlinuz has invalid signature - with secure boot disabled get blank screen

Installing 20.18 from usb with 'quiet splash' removed I get 'Booting from command list /casper/vmlinuz has invalid key' With Secure Boot disabled, grub gets as far as 'Booting a command list' and then ...
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342 views

GRUB is showing Failed to Set MokListRT: Invalid Parameter error after fresh installation of Ubuntu 20.10 on Gigabyte GA-990XA-UD3 in UEFI mode

I just installed Ubuntu 20.10 on my Gigabyte GA-990XA-UD3 in UEFI mode with Windows dual boot and now getting the following message at start: Failed to Set MokListRT: Invalid Parameter Could not ...
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Unable to install Ubuntu 18.04 if Secure Boot is disabled

I installed Ubuntu 18.04 on my Lenovo ThinkPad P73 with Secure Boot enabled but ran into problems installing my Wi-Fi driver. I then tried to re-install it with Secure Boot disabled but after I boot ...
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Installing Ubuntu for Multiboot with Secure Boot

Installed Ubuntu 20.04 into an existing extended LVM volume to co-exist with OpenSUSE Leap 15.2 and also Windows 10 on other partitions, & the Ubuntu installer generated its own grub menu which ...
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I can't use wifi driver with Secure boot enabled

how are you, community. Today, I've got installing Ubuntu 20.04 and all is working fine, except that I can't use the Wifi adapter. The software manager says I have installed it. I have enabled Secure ...
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Load ashmem & kmodsign

I recently install Anbox on my Ubuntu 20.04. I found on the post Module "ashmem" doesn't load with Secure Boot on (but "binder" does load with secure boot on) that I need to ...
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Ubuntu 18.04.5: cannot load module for Intel Wifi adapter [duplicate]

I'm running an Acer notebook that comes with an Intel WiFi adapter. The included kernel does not support it natively, so I found some separate drivers which are installed via dkms. Unfortunately when ...
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Black screen after GRUB menu (Ubuntu 20.04.1 LTS)

for a few day when I start Ubuntu from GRUB I can't visualize the login page because it shows me black screen. I found a lucky(casual) solution going to BIOS of my Asus and disabling the Secure Boot ...
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Windows dual boot is very slow after trying reFINd with shim

on my new laptop next to Windows I installed Linux (SecureBoot, UEFI, grub). In that configurration linux and windows boot fast. I tried reFINd and because boot failed after that I removed reFINd from ...
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680 views

No “Install Ubuntu” option when booting from USB drive

I decided to install Ubuntu on my laptop alongside Windows 10. I downloaded the Ubuntu 20.04 iso file from the official Ubuntu website. I formatted my USB from NTFS to FAT32 and used Rufus 3.12 to ...
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108 views

Secure boot without grub

Since the Kernel embeds a stub bootloader, I am trying to setup a secure boot without using shim or grub for an embedded system that does not need to boot anything else (even then, EFI boot manager ...
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Nvidia driver uninstalls after reboot

I installed the driver for my Nvidia GPU on Ubuntu 16.04 using this manual: How to install nvidia driver with secure boot enabled? However, when I restart, the driver seems to uninstall. When I put ...
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124 views

Is ubuntu trying to update BIOS secure boot keys?

This question is related to this and this posts. I have a HP elitebook 840 g3 running Ubuntu 20.04.1 LTS. After one of the last system & zoom upgrades, I started receiving this BIOS message each ...
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Is there a limit on the number of MOKs we can write to firmware?

IF YOU ARE NOT SURE, PLEASE DO GIVE YOUR THOUGHTS ON THIS After installing Ubuntu, if we install a graphics driver for dedicated graphics card then we need to enroll a MOK to the firmware. As far as I ...
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126 views

Can't boot into Ubuntu

I have dual booted Ubuntu 20.04 alongside Windows 10 this morning. Everything has been fine since installation, but now after restart I can't boot into Ubuntu and this is the error message I see: I ...
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36 views

How to fix 0x1A verification error without disabling secure boot

I am getting this error very recently when I try to boot into a Linux system with secure boot on. I have been using Xubuntu (for learning purpose) for some time, but haven't noticed this problem. I ...
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45 views

Install does not detect secure boot capable UEFI despite secure boot being turned on - NVIDIA drivers fail to load until disabling secure boot

I've had this ongoing issue with my 20.04.1 (and also 18.04.5) Ubuntu install and I've tried multiple ways to ensure this could get installed with secure boot. I currently have windows installed on an ...
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35 views

Install Does Not Detect or Support Secure Boot - Unable to install and have secure boot supported

So I’m unable to get Ubuntu to install where it shows the option on install to turn off secure boot as shown here: https://i.stack.imgur.com/cCTiK.png as found via here: Why was I asked to create a ...
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1answer
5k views

How do I fix broken boot after shim update?

I have a MacBook Pro (15-inch, Late 2008) that was running Kubuntu 20.04 until yesterday. The system prompted me that a software update was available. As best I can recall, the packages updated were ...
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142 views

Terminal how to exit 'Configuring Secure Boot'?

I am on Ubuntu 20.04. While installing virtualbox it is asking to configure secure boot. I do not have BIOS supervisor password and hence cannot configure secure boot. I see no way how to exit this ...
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206 views

How do I remove Canonical's Master Certificate Authority MOK?

I have set up a machine (NUCi10FNK for the curious) for secure booting, created my own MOK, enrolled it, signed a kernel with it, works like charm. Now, I want to remove all MOKs except for mine, so ...
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419 views

How to debug slow boot on Ubuntu 20.04

Since the installation of Ubuntu 20.04 on my Lenovo Flex2 Pro 15, the time between pressing the power button and the appearance of the LENOVO logo on screen is unusually long, i.e. more than 30 ...
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30 views

Unable to load Windows 8 after running bootrepair in through UBUNTU livecd/usb

I tried to install UBUNTU on my Windows 8 laptop using bootable Ubuntu USB. However during installation it told me that there is an EFI mismatch, so I quit the installation. However prior to that ...
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1answer
562 views

What's the right way to install systemd-boot?

Out of curiosity, I'm trying out systemd-boot on my laptop which has UEFI with secure boot. The default GRUB installation is working fine. For systemd-boot, most searches lead to this page. This ...
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1answer
989 views

ls -1 /dev/{ashmem,binder} yields anticipated result for /dev/ashmem, but an error for /dev/binder

Background In another post, I reported that: I'm running Ubuntu 20.04.1 with default kernel 5.4.0-42-generic (installed from Main) on a UEFI system. I want to load two kernel modules ("ashmem&...
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1answer
2k views

Module “ashmem” doesn't load with Secure Boot on (but “binder” does load with secure boot on)

Summary I'm running Ubuntu 20.04.1 with default kernel 5.4.0-42-generic (installed from Main) on a UEFI system. I want to load two kernel modules ("ashmem" and "binder") with ...
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134 views

Secure boot fails with invalid kernel signature after letting battery run out

I have ubuntu running on a Dell 5520. Never had any issues with it other than the laptop shutting down completely, rather than hibernating, when the battery runs out. Last night I let the battery run ...
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1answer
68 views

Dual Boot Ubuntu on HDD and Windows on SDD, tried installing but grub not working

I have an SSD of 256GB with Windows 10 installed in it. I want to install Ubuntu 18.04 on HDD. I tried installing it on HDD by creating /, /boot, /home , EFI partitions ( I was unable to install ...
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965 views

modprobe: ERROR: could not insert 'vboxdrv': Operation not permitted

When I type sudo modprobe vboxdrv all it shows is: modprobe: ERROR: could not insert 'vboxdrv': Operation not permitted I cant find anything to fix this. This is in Ubuntu 20.04.
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I cannot boot Ubuntu if I try to install an NVIDIA drive

I've been having a lot of issues with Ubuntu 18.04 and NVIDIA. First, I cannot access NVIDIA drivers or settings if I enable Secure Boot. I get the following: ~$ nvidia-smi NVIDIA-SMI has failed ...
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1answer
491 views

How do I install the new BootHole update?

I am new to Ubuntu and have 18.04. How do I install the new update to fix the BootHole vulnerability on my 18.04? What commands, process, etc., should I use?
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1answer
1k views

Lost my Wifi connection after running last ubuntu update

I have a problem like the one explain in this post : wifi networks lost after updating I don't know how to solve it. I use Ubuntu 18.04.4 LTS on a Lenovo ThinkPad E15 with a dual boot (windows/Ubuntu)....
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55 views

Total boot failure and grey screen event

PC Laptop: Dell Inspiron 15-3567 (Intel i3, integrated graphics) running solely Ubuntu Gnome 18.04 installed a few months ago. A new, unsolved Boot problem, which began intermittently and has become ...

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