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14
votes
2answers
1k views

The UEFI & SecureBoot impact, how severe?

I'm planning to buy a new laptop in the coming days, and I'm quite impressed with new, cool Ultrabooks. As a long-time GNU/Linux user, I'll of course install a distro of my choice on it. Chances are ...
13
votes
5answers
508 views

Why do most distributions chain UEFI and grub?

Most distributions install a additional boot loader on an UEFI system. UEFI itself is a boot loader, it offers a menu to select different operating systems or individual kernels. Furthermore, the UEFI ...
10
votes
5answers
16k views

Why is USB not working in Linux when it works in UEFI/BIOS?

For background I have just built a new machine with modern hardware including: AMD FX-8350 Gigabyte GA-990FXA-UD3 motherboard 16GB RAM NVidia GTX 650 Ti Kingston SSD Given that, I tried to install ...
6
votes
3answers
1k views

How to make UEFI bootable usb disk from bios bootable iso

Suppose you have an iso image that contains a bios bootable partition. You can write this image to a usb disk In linux you could do this for example with dd if=pmagic_2013_02_28.iso of/dev/sdc1 ...
5
votes
2answers
718 views

How to know if I'm booting using UEFI

I was searching, but didn't found an obvious way to know if GRUB is using UEFI in the system boot, or the BIOS compatibility mode or a full fledged BIOS. Only Windows methods. Is there something in ...
5
votes
1answer
5k views

Arch Linux GRUB install: “EFI variables are not supported on this system”

I am attempting to install Arch linux to a new (and very crappy) HP Pavillion 15 Notebook. This is a UEFI-based machine. After several swings at it, I have managed to get pretty far. Legacy mode is ...
5
votes
1answer
97 views

Upgrade kernel for linux system without upgrading user apps/libs?

I built a custom Linux "recovery-cd" image that consists of a compressed initrd and boots via bcdedit (like Ubuntu Wubi) instead of a physical CD. It has various recovery tools for partition editing, ...
5
votes
1answer
119 views

How to write/edit/update the OsIndications efi variable from command line?

In the need to enter the UEFI firmware setup utility while using ultra fast boot (keyboard drivers are not loaded during POST), I wish to write to the "Os Indications" efi variable. My OS is Ubuntu ...
5
votes
1answer
271 views

UEFI boot Fedora from USB 2.0 on 3.0 port (l75d-a7280)

I'm trying to make a bootable usb in ubuntu for fedora, but my settings are not working. I formatted the USB with FAT & Ext4, MBR, and Legacy BIOS bootable. My BIOS allows the USB 3.0 controller ...
4
votes
1answer
34 views

How do multiple boot loaders work on an EFI system partition

My ESP looks like this Boot Dell fedora Microsoft In the Boot directory, their is a boot-loader named bootx64.efi which I understand is the default boot loader that get started first. But in the ...
4
votes
1answer
593 views

Installed CentOS, Now There is No Windows 8 Options on Restart

I bought a new PC with Windows 8 and wanted to dual-boot linux. I shrank the partition by 50GB in windows, then installed CentOS from a live CD. CentOS is working fine, but I can't boot into ...
4
votes
1answer
305 views

Does UEFI increase battery life?

I've heard about a better power management when using UEFI instead of BIOS. Is that true? It was about energy consumption being more efficient or something like that. If it is true, has the ...
4
votes
1answer
246 views

UEFI and Puppy Linux

I recently installed Puppy Linux on a USB stick using the Universal USB Installer, but I have not being able to boot from it. My notebook came with Windows 8 and had the secure boot activated at UEFI. ...
4
votes
0answers
145 views

How do I use the TPM to seal away data on an UEFI booted system?

I would like to seal away files on my system using keys stored in the TPM. Since my system uses UEFI to boot, I can no longer use TrustedGrub as a boot loader to maintain my trust chain. Are there any ...
3
votes
2answers
117 views

How to query EFI signature

It appears that Grub-EFI will only boot a "signed" Linux kernel. Is there some command that will allow me to query a given kernel image to find out what signatures (if any) are present on it?
3
votes
1answer
1k views

Dual boot windows on second harddrive, UEFI/GPT system

I'd like to install linux, but I don't want to risk damaging my current windows installation as I have heard a lot of horror stories. Fortunately, I have an extra hard drive. Can I install linux ...
3
votes
1answer
2k views

Boot SystemRescueCd using UEFI?

How would you boot SystemRescueCd if you don't have the option to use the legacy-bios? I have the new UEFI and I have no luck booting SystemRescueCd(with a USB stick). I am planning to back up my ...
3
votes
2answers
198 views

Switch debian install from legacy to UEFI

I have Debian 7 installed on my laptop on the ssd and windows 8 on the hdd. Currently to boot Windows I go into the bios and change a boot setting from legacy to UEFI, which means to boot Debian I am ...
3
votes
1answer
416 views

How can I install Linux on a UEFI system with Secure boot?

My motherboard is a Gigabyte 990XA-UD3 (CPU 1), it's a UEFI -Dual boot, and when I try installing Linux Mint 16 Cinnamon or Ubuntu 13.10 it always bring this error (initramfs) Unable to find a medium ...
3
votes
2answers
429 views

Any chance to fix dual boot not having to turn UEFI on and off to switch OS?

I had a single Linux hard drive with LUKS partitions. Linux was installed in legacy mode, but it worked with UEFI option turned on later. I decided to install a Windows 8 on a second hard drive. So I ...
3
votes
1answer
571 views

Can't get past EFI to install RHEL on HP Itanium Server

When I am trying to install RHEL (6.3, 5.8, 4.8) on an HP Integrity Server rx2660 Itanium with 4GB RAM, I keep getting to the same point which is Loading file efi\boot\initrd.img...done After that ...
3
votes
0answers
159 views

When do I need to specify add_efi_memmap as kernel argument in UEFI/EFI boot?

I am reading some tutorials how to EFI stub (efistub) load the Linux kernel. These instructions often use kernel boot parameter add_efi_memmap. The intended hardware is Intel x64 having 8GB of RAM. My ...
3
votes
0answers
1k views

UEFI install (14.04) boots to GRUB command prompt, no GUI

I just installed zorin 9 core (14.04) on my Hard-Disk in UEFI mode. But, when I boot, all that comes up is a GRUB2 command line. I've searched for solution and came up with this command configfile ...
3
votes
2answers
87 views

How can you configure a system to be bootable from most modern systems?

How can a Linux system be installed on a portable storage medium so that both BIOS systems (e.g. a ThinkPad) and EFI systems (e.g. a Mac Mini) can boot to it? The reason I ask is because I tried ...
3
votes
1answer
380 views

Builiding a UEFI bootable USB

I'm having a really hard time getting Mint13 installed on my new laptop, no optical UEFI support and having odd corruption of grub.cfg when I do try and use unetbootin. Is there a method to build a ...
3
votes
2answers
2k views

Can't boot live USB of Linux Mint DE on my UEFI PC

I used the Universal USB Installer application to copy the latest ISO image from Linux Mint DE (64 bits) and install it on my PC, however when I try to reboot it I have the option to choose my ...
3
votes
1answer
723 views

How to configure GRUB to load Windows 7 Install in UEFI mode

I have a Dual-Boot USB I created with Multisystem for booting into PartedMagic, Ubuntu 11.10 & Windows 7 Install. Problem is Windows 7 says it cant install on a GPT partition. Googled, and found ...
2
votes
1answer
7k views

Installing debian 7 besides windows 8

I ask this question in superuser but no one can answer my question, I hope any one can help me: I bought a VAIO laptop which Windows 8 preinstalled on it in UEFI mode. Now I want to install Debian 7 ...
2
votes
1answer
602 views

How much speed difference for a tweaked bios versus uefi boot? [closed]

EFI can be faster, but that's not certain. The biggest speed difference is in hardware initialization early in the process. On my systems, this is a fraction of the total boot time, so a ...
2
votes
1answer
173 views

Is it safe to delete old boot and EFI System partitions?

I have installed a new OS in the free space of the same hard disk after failing to upgrade the old one. Now there are two copies of boot partitions and EFI System partitions. After a harrowing ...
2
votes
1answer
1k views

USB keyboard only works intermittently in GRUB 2 on reboots - how to make it work consistently?

Something weird is going on with my keyboard. The keyboard is a USB-connected Unicomp, which works absolutely flawlessly once the computer is up and running. However, GRUB 2 (specifically, ...
2
votes
1answer
182 views

grub2: how to bypass “press any key”?

I recently updated my motherboard and moved my grub2 onto EFI partition. I have same grub menu, but after I select a menu entry and press Enter, a message "Press any key" comes and the loading stops ...
2
votes
1answer
196 views

Installing linux on an 32bit UEFI only machine

I have a Intel BayTrial Z3735D tablet which comes with a 32bit UEFI BIOS. After some search I've found that most linux distro don't come with a 32bit efi file. How can I insert one (or build a new ...
2
votes
0answers
60 views

linux boot manager has been blocked [SOLVED] [closed]

I've just installed arch linux on a UEFI motherboard. as bootloader I installed "gummiboot". I've got the following problem, when the computer stars I recive the message: "Linux Boot Manager has been ...
2
votes
0answers
20 views

Signing GRUB bootloader

The laptop I recently bought uses UEFI. As an experiment, I think it would be really cool to generate my own keys and use them to sign my bootloader, and also to password protect the bootloader. How ...
2
votes
1answer
2k views

Arch Linux on an UEFI-GPT system with Windows 8.1 dual booting [closed]

I'm going to install Arch Linux on an UEFI computer. I've also Windows 8.1 installed and I would like to keep this operating system in dual boot with Arch. I should ask many questions, because this is ...
2
votes
1answer
298 views

efivars data missing from procfs and sysfs

I'm trying to install ubuntu on a Tab-X 10.1 Intel WinPad. The UEFI loader only allows booting from 32 bit efi images. Ubuntu only supports UEFI in 64 bit versions. I'm trying to get the 64 bit ...
2
votes
1answer
385 views

How do I dual-boot 2 (or more) Linux distributions with gummiboot and UEFI?

I have Arch installed as my main OS with gummiboot for booting. I'm planning to dual boot with Fedora 20 soon but I am currently held back by some doubts. Do I need to install Grub2 for Fedora even ...
2
votes
0answers
375 views

Dual boot Linux Mint in a GPT style hard drive along with Windows 8

I have a Sony VAIO e series laptop which came with Windows 8. I wish to install Linux Mint as additional operating system. Only at the time of installation I could find that my HDD is of GPT partition ...
2
votes
1answer
697 views

How can I get a new Fedora 19 install to boot on Intel NUC

I have a newly installed Fedora 19 on an Intel NUC computer. During installation, I selected the "reclaim all space" option and took the default partitioning. The install created an EFI boot ...
2
votes
0answers
194 views

How do I use custom-signed shim for secure boot (Fedora)?

I'm not sure whether there's a guide for this but I'd like to know the detailed steps (step-by-step guide perhaps?) involved in achieving the following: Re-sign shim with a custom CA private key, ...
2
votes
1answer
384 views

Installing the kernel EFI stub loader in kernel 3.2?

Kernel EFI stub loader support was added in kernel 3.3, but I'm stuck on 3.2 running an Ubuntu 12.04 64bit distribution. Is there a way for me to somehow bring that stub loader support into my kernel? ...
1
vote
2answers
534 views

Cannot install Ubuntu on EFI/GPT scheme

Shame on me, I have more than 10 years using Linux and all of this about EFI and GPT is a nightmare :( I have a Dell Inspiron 14z Ultrabook and I cannot install Ubuntu; when I launch the installer it ...
1
vote
2answers
605 views

Can no longer boot after updating Arch

I am running Arch Linux with the Gummiboot boot manager. Everything was fine until I updated. I can't remember the exact packages that were updated but I'm pretty sure Gummiboot was one of them. Now ...
1
vote
3answers
269 views

USB booting to installing Linux on a new Lenovo laptop

I recently got a Thinkpad T440s with Windows 8.1 for my job, and since most of my work is done under Linux I am going to install Ubuntu on it, so that I can dual boot. The problem is that it won't ...
1
vote
1answer
317 views

Installed Fedora 18 on UEFI machine, got lvm.mod not found error

I've installed Fedora 18 on UEFI system, when I boot the computer I get this error message: File "/EFI/fedora/x86_64-efi/lvm.mod" not found no server specified What should I do?
1
vote
2answers
263 views

Grub menu not appearing

I have a windows 8.1 installed in my lenovo z570.I installed linux mint 17 from an USB created using YUMI software. After installation the grub menu doesn't appear and windows gets booted up ...
1
vote
1answer
884 views

Fixing Lilo with uefi system and no optical drive

Recently I have been trying to boot into Slackware on a new laptop that came pre-installed with Windows 8. I have successfully installed Slackware and Lilo, but I have had great difficulty trying to ...
1
vote
3answers
96 views

Wrong iso file preventing from booting Debian dvd with uefi

I have this new computer (MSI Ge70 2PE Apache Pro) that came with Windows 8 and UEFI. I made a partition to install Debian testing 64bits on the same HD where Windows is. I had no problem making the ...
1
vote
1answer
223 views

Why am I getting “no boot disk has been detected” after installing Linux?

After installing a Linux distro (Fedora 19, to be exact) on a Windows 8 machine I got the message: No boot disk has been detected or the disk has failed. What did I do wrong?