Questions about the Unified Extensible Firmware Interface that finally replaced the BIOS on newer desktops and laptops with the release of Windows 8. UEFI is independent from CPU architectures and supports booting via UEFI with and without secure boot enabled as well as legacy booting via CSM.

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Boot repair ubuntu

So I had lots and lots of troubles installing ubuntu, and now it won't boot from windows 7 nor from ubuntu. Even though I partitioned my C:/ drive and put ubuntu on a seperate partition, keeping ...
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1answer
25 views

Creating Windows Partition and Dual Boot from Stand Alone Ubuntu 14.04

Ok after a few days of searching with no luck, not even help from the volunteers at boot-repair techs. I've decided to post on here and youtube. Here's my situation: Acer Aspire V5-122P 1.0 Ghz AMD A4 ...
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1answer
28 views

Possible to backup contents of boot partition, format it and copy contents back to it?

I am trying to install Windows 8 on an iMac (mid 2010 model). The iMac already has Ubuntu 14.04 installed on it which I intend to keep. So basically I would like to dual boot Ubuntu and Windows 8. ...
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0answers
81 views

Dual Booting Windows 10 and Ubuntu 14.04.2 on Lenovo Yoga 2 Pro

as a preface - my only experience with Ubuntu is playing around on VM's, so I apologize in advance for any naivety. I've just updated my Yoga 2 Pro from Windows 8.1 to 10, and am trying to install ...
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1answer
18 views

Boot-Repair made Dual Boot System unusable

After an Update to Ubuntu 14.04, the system no longer started and showed the grub rescue prompt. I was able to start from CD by pressing F10 at the beginning to select the boot medium. Then I was able ...
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6 views

while booting system msg:“(initramfs)unable to find a medium containing a live file system” [duplicate]

i have tried to dual boot my system with window 8 and _ubuntu_14.04- (pre-emphasized textinstalled).as i inserted disk of window 8 and there comes a option of language, after selecting language option ...
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2answers
26 views

I only have ubuntu in a laptop with UEFI. How can I change the OS? [on hold]

Well, Before I start explaining my problem I would like to apologize for the mistakes I could commit since I'm not an english speaker. This is the thing: I bought a laptop and it came with Windows 8, ...
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0answers
20 views

Help with botched 14.04 LTS dual boot install/Auto-boot grub fails to get into windows 8.1

First-time poster here, sorry if the title isn't written well(suggestions welcome) System specs(if helpful): AMD 750k processor Asrock FM2A55M-HD+ mobo Seagate 1TB SSHD(hd0) WD 320GB HDD(hd1) 8gb ...
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2answers
36 views

Windows 8 installer complains about MBR partitions, but I don't see any?

I would like to install Windows 8 on my iMac (mid 2010 model). Currently the main OS on the iMac is Ubuntu 14.04. Using gparted I created an NTFS partition in preparation to install Windows 8 on it. ...
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1answer
36 views

rEFInd can't find Lubuntu kernel on Lubuntu partition

I was sent here from another forum. I'll repeat my entire post here for completeness: I'm trying to get refind to boot the Lubuntu kernel directly instead of maintaining the manual config and using ...
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0answers
6 views

Lenovo z510 ubuntu + windows [duplicate]

I need to install ubuntu on my windows 8.1 and I need so I can load at startup or windose laptop or Ubuntu, so I tried it already seems to me it is not correctly installed, and download it into my ...
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1answer
48 views

Dual boot not working (unable to load Windows) on ubuntu

I am new to linux(ubuntu) and have installed it while following different blog posts and stuff to keep my Windows installed and I hope it is. I selected Something else option while installing but now ...
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1answer
43 views

ubuntu no longer starting in secure mode

I had a working dual boot system, Kubuntu 15.04 and Windows 8.1 - after an update 3-4 weeks ago, Ubuntu wont boot when secure mode is enabled. I get an error message "Invalid Signature Detected. Check ...
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0answers
31 views

Know my windows 8 product key

I have had several problems trying to install Ubuntu alongside my windows 8.1 so as it was booting in UEFI mode, as Im not that into pc games, I decided to format the hard drive and just install ...
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2answers
117 views

“Error: Invalid signature” when configuring dual boot Ubuntu 14.04 and Windows 10

After installing the Windows 10 upgrade on my laptop, it ruined the grub boot manager, and I could only boot in windows 10. I fixed the boot manager using a live cd with the boot-repair tool, but it ...
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0answers
38 views

fail to load - grub rescue>

I had dualboot with windows and linux, I tried to change size of windows C: volume and after reboot, it doesn't load ends with grub rescue shell. If I trun on UEFI boot in BIOS it ends with "No ...
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0answers
49 views

nvidia vs. nvidia-updates?

OK, so I haven't find any answer, only one that claims the "nvidia-updates" is newer versions, yet the driver instalator says this: 4 options: nvidia 331.113, nvidia-updates 331.113, legacy nvidia ...
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2answers
43 views

Ubuntu kills USB 3.0 Chipset on Asus Z87-PRO motherboard

I have PC based on Asus Z87-PRO Motherboard. I have installed both Windows 7 & Ubuntu 15.04. When I have to reset Ubuntu (e.g. because of freezing) all of USB 3.0 ports stop working. Completely ...
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0answers
12 views

GRUB 2 dual boot freeze for a few seconds

Sorry for asking this question again, asked it here a long time ago but didn't get any answers. Since I setted up dual boot with Ubuntu and Windows 8 I have this "problem", grub menu shows up, if I ...
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0answers
44 views

How can I boot from a USB device via grub shell or initramfs?

I recently got my Dell XPS 13 with Ubuntu 14.04 preinstalled. After some time I tried to update Ubuntu (big mistake) just to find out that it doesn't work out of the box and there are some issues to ...
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3answers
55 views

Can't boot after boot-repair

This morning starts with ubuntu updates installation, which unfortunately freezes at some point. I hard-rebooted my laptop and got grub> command-line. There I tried manual boot from each of two ...
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0answers
9 views

Unable to acces BIOS setup menu

Firts, sorry for my english level, I'm french ! I would like to install in dual-boot windows 7 and Ubuntu, to do this I must acces to my BIOS at the startup of my computer but when I want to acces my ...
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0answers
16 views

Same Ubuntu on external SSD used on different machines : feasible, or not?

I happen to work with some new and old computers, all of them 64-bits, with at least 4 GB of RAM. So my question could remind this one : How can I install Ubuntu on an external hard drive so that I ...
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2answers
39 views

Ubuntu on 32-bit UEFI - optimal solution

I have a computer (Asus T200TA) with 2G RAM and 32-bit UEFI [Yep, what a wonderful idea to put 32-bit UEFI!]. I have two options: Install a 64-bit system, boot manually and install grub-efi-ia32. ...
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1answer
113 views

Can I create a bootable Windows 7 installation USB from within Ubuntu to boot a 2010 model iMac?

I have a 2010 model iMac on which I have installed Ubuntu 14.04 as the sole OS. I would like to install Windows 7 as a dual boot. I have freed up some space on the HDD. No matter what I try, I am ...
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3answers
37 views

How to install Ubuntu on Toshiba Satellite c850-19z

My computer is using UEFI and is running Windows 8. I've tried install Ubuntu before but I only got as far as putting it on a USB (using universal USB installer). But when I go to the boot manager on ...
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0answers
10 views

Cannot install 14.04, cannot boot, no correct live environment

I cannot install Ubuntu 14.04.2 on my Acer aspire es1-531. I ran BootRepair and it gave me this paste. I added the nomodeset param to the grub2 to let the live or the installer run properly. I noticed ...
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1answer
30 views

Wanting to replace pre-installed Windows 8.1 on my Lenovo laptop with Ubuntu. Needed help on which partitions to remove and which to keep

I have the following partitions right now on my laptop: 1000 MB (Healthy OEM Partition) 260 MB (Healthy EFI System Partition) 1000 MB (Healthy OEM Partition) 462.14 GB (Healthy Boot, Primary ...
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2answers
20 views

boot-repair windows not listed

today I installed Windows 8.1 and it broke my grub. I tried to run the boot-repair GUI on a live session of Ubuntu but after the restart of the PC the grub displays ONLY Ubuntu. Before the ...
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1answer
38 views

Unable to access BIOS menu after installing Windows 8

After installing Windows 8 in UEFI mode I can no longer access the BIOS menu. I have tried different solutions to access the BIOS menu but I was unsuccessful. I want to switch to Ubuntu but the live ...
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0answers
14 views

How do I fix Ubuntu 14.04 LTS to work properly with UEFI BIOS Power Management (PME)?

Good morning. I have an ASUS motherboard: F2A55-M v1.02 and it is running the most recent BIOS from the manufacturer: 6603. I use the computer as a media server and want to be able to remotely wake ...
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0answers
3 views

grub2: error: /vmlinuz-3.16-ucs109-amd64.efi.signed has invalid signature [migrated]

I am using a derivative of Debian, called Univention Corporate Server. It's a nice appliance that I use for my home server. Yesterday I upgraded to the newest version and since then my server does not ...
1
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1answer
50 views

Ubuntu 15.04 Kernel panic - Samsung Series 9

Samsung Series 9 Laptop crashes in ubuntu 13.04-15.10 and other Linux (debian, arch, freebsd). Check: cleaned laptop, change the battery, change CPU cooler, memtest, temp. kernel 3.11 - crashes ...
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0answers
58 views

Unable to Dual Boot Ubuntu 14.04 with Windows 7 on UEFI [duplicate]

I have an Acer pc and it is running Win7. Because I'm having problems with that OS I wanted to do what the title suggests. And everything works great after the install. But everytime I try to restart ...
2
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1answer
44 views

Grub 2 menu isn't showing up after installing Ubuntu 15.04, Windows 8.1 is preinstalled

I did boot-repair, ordered boot order through efibootmgr even did grub repair from live cd. but nothing happened yet. suggest solutions
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2answers
67 views

Cannot boot directly from Grub2 on dual boot Windows 8.1 with Xubuntu 14.04.2

I had Windows 8.1 Professional and Xubuntu in VM, but now I want dual boot. First two partitions I had them before with Windows 8.1 ((1) EFI and (2) msftres) then (3) partition C: and (4) parition ...
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0answers
43 views

Custom Ubuntu 15.04 Installer - Fails grub install on UEFI systems

I used the ubuntu 15.04 64 bit ISO and customized it using UCK. I installed a bunch of packages into the custom installer & generated the ISO. It installs perfectly in Legacy mode (non UEFI) In ...
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0answers
15 views

Cant get 15.04 or 14.10 or any version of Ubuntu to boot on Flex 10

I've seen a few questions around bit no one has really been able to hope. Ive been trying to get 64bit Linux working on this laptop through its 32bit EFI every nown and again for about a year now and ...
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0answers
43 views

how can I regain bootability of ubuntu after ubuntu 14.04 install alongside Win8.1

I am familiar with win but new to linux. The pc is a Dell Inspiron 660. The bios is AMI, build date 7/26/12, with the Aptio Setup Utility. I installed ubuntu alongside win8.1 via usb created with ...
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0answers
38 views

failed to open \EFI\Boot\grubx64.efi

I installed ubuntu 15.04 next to windows 8.1, both in UEFI mode and after that windows always booted first, so i used boot-repair to fix the grub and now i get this when the computer starts: Booting ...
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1answer
46 views

Install Ubuntu Linux Desktop 15.x on Pre-installed Windows 8.1 laptop and have dual boot [duplicate]

I looked at various questions all over the internet. Infact i did the same almost 6 months back on my HP Desktop but i did so much hit and trial that i have forgotten what to do this time? Do i need ...
1
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0answers
23 views

After Installation in Dual Boot (UEFI), SSD Partitions Management

I installed ubuntu in dual-boot in a laptop with pre-installed Windows 8.1 (uefi) with 500gb HDD and 32gb SSD. During and after installation everything went Ok, but as recommended, I leaved the SSD ...
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0answers
30 views

How to change the boot menu icons + rename on my MacBook Air for a liveUSB

So I have a liveUSB with persitence installed with unetbootin from my mac (using this tutorial : https://www.youtube.com/watch?v=MpwrrQ36yqM ), and it works perfectly. However, when booting my mac ...
1
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1answer
75 views

Can't get Ubuntu to boot from EFI in Mac

I am trying to get an old ca. 2006 macbook (technical specs here) to boot Ubuntu 14.04.2 LTS. I'm on day two of this now, having wiped the hard drive numerous times and reinstalled from the disk ...
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2answers
86 views

Toshiba satellite radius not loading bootable usb

I recently bought a Toshiba satellite radius (model: L15W-B1120). I already read countless of posts. In the posts they recommend to disable secure boot and also fastboot, I already did. I created a ...
0
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1answer
57 views

Secure boot / UEFI Boot issues after 15.04 installed

I have a Dell XPS 13 (2015) with Win 8.1 Pro installed. I created a UEFI USB boot drive with Ubuntu 15.04 on it. Using Windows I shrank my windows partition by 40GB. I inserted the USB and rebooted, ...
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2answers
125 views

Boot Ubuntu from external USB HDD on Retina MacBookPro 2015

I've installed Ubuntu 15.04/x86_64 on an external USB HDD, the disk has a GUID partition table, and the Ubuntu was installed with EFI boot manager. I can successfully boot the USB HDD on some Windows ...
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0answers
66 views

Installing Ubuntu dual boot with pre-installed windows 8.1

i have an HP envy DV6 laptop, with UEFI, 1 terabyte (GPT),with pre-installed windows 8.1. i am trying to install Ubuntu 14.04 (64) ,i have tried 15 also with USB. when i start installing i find that ...
3
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2answers
93 views

Repair Windows Boot Loader after installing Ubuntu on MacBook Pro

I installed Ubuntu 14.04.2 LTS on MacBookPro11,5 (Retina) with Mac OS X Yosemite following this guide: https://help.ubuntu.com/community/MacBookPro11-1/Saucy The thing is that I already have Windows ...
2
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1answer
46 views

Ubuntu UEFI Dual-Boot without boot repair

I have an HP Pavilion with Windows 8.1 pre-installed. I managed to dual boot Ubuntu 15.04 successfully. Then, I replaced the Windows Boot Loader with the grub loader as default by entering this ...