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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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
29 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
67 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
31 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
34 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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1answer
30 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
32 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
46 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
14 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
28 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
76 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
32 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
9 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
21 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
16 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
33 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
9 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
30 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
44 views

Unable to Dual Boot Ubuntu 14.04 with Windows 7 on UEFI

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
31 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
52 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
30 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
25 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
40 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
19 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
23 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
66 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 ...
0
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2answers
75 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
46 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
105 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 ...
0
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0answers
62 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
75 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
votes
1answer
35 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 ...
0
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1answer
63 views

Lubuntu 15.04 installation problem (Installation CD + UEFI mode)

I have Windows 8.1 on my Lenovo G500 laptop and I want to install Lubuntu allongside (dual boot). Windows boot in UEFI. My problem is that after booting from the CD and choosing any of the options ...
3
votes
1answer
16 views

legacy boot in case of lost uefi ubuntu

I have windows and ubuntu installed in uefi mode. But, if I loose my bios config or reset settings to default, I loose ubuntu's boot. And when it's happens, I just can boot windows. I think there is ...
1
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1answer
35 views

Ubuntu Boot Problem00

so I have a very depressing problem actually. I'm not sure what I have exactly done, but I'm pretty sure its within the limits of removing the Windows boot loader partition that remained after I ...
2
votes
0answers
38 views

How to install ubuntu along with pre-installed window 7 home premium (UEFI) in sony vaio sve14a15fn

I really tried alot to install ubuntu alongside with my preinstalled window 7. also, read many articles posted on internet regarding dual window installation. But nothing is working for me. So, I need ...
0
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1answer
25 views

Troubles for Installing ubuntu in HP1000 with Windows to go

I found this question which was duplicated here that is related with the same model I have. But in my case I don't pretend to install gnu/linux alongside with win 8. In fact Windows 8 was banished ...
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0answers
21 views

Deleted EFI boot files

I had a perfectly functioning windows 8 / Ubuntu 14.04 dual boot set up on my Surface Pro 3. I was using the rEFInd bootloader and I decided that I would like to return to Grub bootloading. In my ...
0
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1answer
101 views

Install Ubuntu 15.04 alongside Windows 8.1

I know the question is repeated but my question pertains to a very specific issue and is likely to be useful for future users who would install 15.04. I read the original answer and it says there ...
0
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1answer
56 views

Can't boot Ubuntu from live USB on HP Spectre x360

I am unable to boot Ubuntu 15.04 from a live usb created with Lili usb creator. I have gone into the bios and disabled secure boot and changed the boot order so the usb is first on the boot order. It ...
0
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1answer
20 views

I can't install Ubuntu besides windows without format

So I have a SSD of 120 GB on which I have a Windows 8.1 installation. I decided to install Ubuntu besides my Windows 8.1 on my ssd, all went good, I started configuring the OS and installing drivers. ...
1
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1answer
51 views

Cannot boot into Ubuntu after install

I installed with what I thought were the recommended partitions but I think I may have done something wrong. I'm not loading windows or any other OS and I don't have anything indispensable on the ...
1
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0answers
13 views

installing ubuntu 14.04 LTS on ASUS UX303LN [duplicate]

i'm trying to install ubuntu on my laptop asus UX303LN in dual boot mode, but i got some problem. my configuration : GPU : GT840m, Hd 4400 CPU : i5 - 4210u HDD : 500GB SecureBoot : Disabled CSM : ...
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0answers
46 views

Ubuntu - win 8.1 dual boot - ssd and uefi woes

I built my new computer last week and decided it was about time I installed my dual boot. I disconnected the gpu as I was getting an out of range issue with the monitors, presumably as a result of not ...