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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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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Secure Boot : No Dual Boot

How to load-up Ubuntu keys in secure boot? I simply want to install Ubuntu 14.04 as my only OS and in secure boot. Right now I'm getting the error "Invalid secure boot policy" but it boots up after ...
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15 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 ...
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1answer
2k 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 ...
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42 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, ...
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1answer
89 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 ...
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1answer
103 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 ...
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1answer
100 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 ...
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1answer
79 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 ...
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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. ...
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21 views

Ubuntu dual-boot with preinstalled win 8.1 - How to install properly? [duplicate]

Is it possible to install Ubuntu alongside pre-installed Windows 8.1? Would it cause the removal of 8.1? I also heard something about UEFI and secureboot and such things that could cause problems. ...
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1k 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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3answers
5k 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 ...
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1answer
435 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 ...
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1answer
154 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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0answers
115 views

Can't locate secure boot option in bios

I'm using an ASUS K46CB Notebook and I'm trying to disable secure boot in order to install ubuntu 14.04. However, I've tried numerous times but I can't seem to locate the secure boot option in my BIOS ...
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1answer
117 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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2k 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
9k 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 ...
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1answer
149 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 ...
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3answers
195 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 ...
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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 ...
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2answers
147 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 ...
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478 views

Not sure which way to dual-boot Ubuntu 14 and Win8.1

I have a Dell Inspiron 1500 3000 series and it came preloaded with win8.1 and I would like to dual-boot Ubuntu 14. I have read 10+ guides and watched 5ish videos and I feel fairly confident that I can ...
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1k views

Security Freeze Lock - hdparm shows “frozen” status SSD

SSD - Intel 330 180GB, Motherboard: Intel DH67CL1(latest BIOS and has the option to enable "uefi") I ran gparted livecd to find that, brand new SSD under hdparm -I /dev/sda shows "frozen" state. I ...
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1answer
322 views

Lubuntu 14.04.1 - load installer components from cd fails, although integrity is ok - why?

I am trying to install lubuntu-14.04.1-alternate-amd64 on a USB Stick - and oh my, is that some trouble. My Setup: Win7 UEFI System with enabled Secure Boot My Target: 64GB USB 3.0 Stick in USB3 ...
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2answers
6k views

Lenovo G500 how do I turn off secure boot to install Ubuntu 14.04?

I am trying to install Ubuntu 14.04 on Windows 8.1. I have gone through the manuals in the internet and in "askUbuntu" but I have found no solution. I have turn off "fast boot" option in Windows as ...
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0answers
1k views

Ubuntu 14.04 LTS desktop not getting shutdown

My Computer : Intel i5-4440 Quad Core on Intel Motherboard DB85FL (built-in graphics). I upgraded to Ubuntu 14.04 LTS from 13.10 through 'Software Updater'. The process was fully automatic and ...
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1answer
40 views

Laptop doesn't show systems menu while booting

Welcome all, I have installed Ubuntu 12.4 lts on win 8 with secureboot enabled now after installing it the PC boots directly to Ubuntu and I cannot access win 8 When use boot repair it asks me to ...
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2answers
864 views

Boot problems after uninstalling Ubuntu

I have a Sony Vaio PC and after uninstalling Ubuntu from my laptop I went into a problem that I can't fix. I get a error message that says: SECURE BOOT FAILED! Your VAIO has detected an invalid ...
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1answer
3k views

Installing Ubuntu 13.10 with UEFI/secure boot enabled. Dualboot with win 8.1

First of all: I am well aware of the following the existing thread on UEFI, as well as the guide by Rod Smith, and I have read on the problem on various forums for maybe 10 hours (2 days), but could ...
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1answer
2k views

Installing ubuntu to my windows 8 tablet pc

I bought a samsung tablet pc and there comes windows 8 at the beginning of my tablet pc I want to install latest ubuntu version and delete windows totally but when i am trying to install ubuntu while ...
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1answer
1k views

Unable to boot from USB drive [duplicate]

I am trying to boot Ubuntu 13.10 from a USB Drive. I was expecting a regulation procedure: BIOS>BOOT-order-tweak>boot-from-USB. But it didn't work. I recently upgraded from a 7 year old laptop, and am ...
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1answer
1k views

Boot-Repair Ubuntu 12.04.3 whilst leaving SecureBoot on

I just installed Ubuntu 12.04.3, and afterwards Ubuntu boots perfectly (even with SecureBoot still enabled etc), however selecting Windows 8 leads to the common errors: Secure Boot forbids loading ...
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1answer
2k views

efi disk read error and secure boot error before GRUB splashscreen

I have finally got Ubuntu and Windows 8 booting correctly under EFI on Dell i660. However I am seeing error message right before the GRUB splash screen - error: efi disk read error. (x3) These are ...
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1answer
84 views

What is the role of the following files during boot from live usb?

/boot/vmlinuz-3.8.0-29-generic /boot/vmlinuz-3.8.0-29-generic.efi.signed /usr/lib/linux/vmlinuz-3.8.0-29-generic.efi.signature /casper/vmlinuz.efi /cdrom/preseed/ubuntu.seed /casper/initrd.lz ...
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1answer
2k views

Does Ubuntu 13.10 still encounter issues with UEFI and Windows 8?

It is time for a Laptop upgrade, I am going to buy a sub £300 laptop that comes with Windows 8 pre-installed. I then plan to either wipe it clean and install the new Ubuntu 13.10 or dual boot it with ...
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1answer
987 views

Secure Boot Failed - OS not Valid Ubuntu 13.04 Windows 8 Sony VAIO

This is an extension of this question: Failing to install Ubuntu 13.04 I have wiped the cobwebs out - i.e. I have realized that I wasn't following instructions properly. I will continue to try to ...
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1answer
398 views

Unable to boot into Ubuntu 12.10 installed outside windows 8 [duplicate]

I am using Sony vaio E series. I installed Ubuntu in one drive. But when I restarted the system it directly goes into windows without showing any options for ubuntu 12.10.I am new to Ubuntu. Please ...
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1answer
3k views

How to reinstall Ubuntu over Elementary OS on an EFI system?

First, a bit of background. I managed to dual boot Ubuntu 13.04 with Windows 8(preinstalled). I disabled secure boot. I had to go in the bios settings and change the disk order to select Ubuntu as the ...
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1answer
91 views

Installing Ubuntu on a SecureBoot machine with no existing OS

I was given some bad(malicious) advice, and my entire OS was deleted. I had Ubuntu before, fully replacing the Windows 8 that came with my Acer Aspire 1 laptop. I tried reinstalling Ubuntu from a ...
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1answer
2k views

Installing 13.04 with Windows 8 - Secure Boot Failed

I have a Sony laptop with UEFI, SecureBoot and Windows 8. I read Ubuntu UEFI recommendations, then freed some 35 gb on system hdd and installed Ubuntu 13.04 64 bit in EFI mode, keeping Windows 8. ...
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0answers
166 views

Linux Mint install failed, trying Ubuntu 13.04 [duplicate]

I tried to install Linux Mint 15 on a Windows 8 laptop. The install went fine, but after rebooting, all I got was a command line. After spending most of the day dealing with that unsuccessfully, I'm ...
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2answers
5k views

Ubuntu 12.04 and 13.04 installs fail if Secure Boot (UEFI) is enabled on Toshiba Tecra R950

Just bought a Toshiba Tecra R950 laptop, which comes with Secure Boot enabled by default, and Win8 preinstalled. I wrote an Ubuntu 12.04 amd64 iso on an USB using Linux Live Usb Creator - LiLi (I use ...
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1answer
14k views

UEFI 13.04 install on Lenovo IdeaPad Y510p boots Windows instead

I am trying to install 64-bit Ubuntu 13.04 on a Lenovo IdeaPad Y510p. This machine is pre-installed with Windows 8, which I want to keep (the machine is partly a game console). I shrank the ...
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1answer
903 views

Will Windows 8 removal and secure boot disable cause no problem in using Ubuntu?

I heard that recent laptop computer with Windows 8 operating system enables secure boot which can cause problem while installing or using Ubuntu, and worrying because I have a plan to buy laptop with ...
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1answer
436 views

How can I dual-boot Ubuntu 12.04 with Windows 8? [duplicate]

I've been trying to dual-boot Ubuntu alongside Windows 8 on my Thinkpad T530, with no consistent success. I was able to burn the .iso image for 12.04 onto a DVD and then boot the DVD at startup, and ...
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1answer
286 views

Unable to install Ubuntu 13.04

Okay so, I'm trying to install Ubuntu on my Lenovo B570 because my Windows screwed up saying it's missing a boot file, which is the 5th time it's happened to me. When I go to install Ubuntu, the ...
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1answer
1k views

How to dualboot 12.4.2 alongside Windows 8 without Wubi? [duplicate]

I've just bought a new Acer laptop that came preinstalled with Windows 8 in Secure Boot (enabled). Since Wine can only do so much, I want to keep my Windows8 and install Ubuntu 12.4.2 alongside it, ...
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1answer
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How to burn / create a bootable USB or CD for UEFI-secure-boot

I used Lili (LinuxLive USB Creator) to create a bootable USB Stick based on the 64bit Lubuntu 13.04 iso with Windows 8 Uefi secure boot. The stick starts only in legacy boot, but not in Uefi mode. ...