General UEFI install Info (not for Macs)
Caution:
Do not turn legacy on. Most work better if UEFI only setting used. Lenovo annouced all 2020 products will be UEFI only (UEFI Class 3 or no CSM).
https://support.lenovo.com/us/en/solutions/ht510878-legacy-bios-boot-support-removed-in-lenovo-2020-products
Note: Samsung may brick in UEFI mode. Better to use BIOS. https://bugs.launchpad.net/ubuntu-cdimage/+bug/1040557 (old but still valid)
Ubuntu 22.04 LTS is now available. Desktop & other versions & flavors here:
https://ubuntu.com/download
Note that 22.04, & 20.04 LTS are long term support versions. See below on enablement stack versions.
Very new hardware may need the newest version to have updated kernel & drivers. And that may include the 9 month support versions released between the LTS versions.
Systems need UEFI updates for or Meltdown/Spectre mitigation, both Windows & Linux kernel updated, but new variants regularly found, so regular updates needed. One exception: Do not update UEFI for x299 if Kaby-X Also June 2021 many Dell models need UEFI update. See below for more info.
If SSD, you may also need firmware updates
If re-installing Ubuntu only use Something Else (links to examples below).
Do not use LVM nor full drive encryption if new user. It will erase your Windows and requires advanced knowledge. But many advanced users especially with servers use LVM.
Many brands/models have unique settings, see below.
Backups are very important, see backup section below.
UEFI is now a bit more complex than the old BIOS install as it includes both UEFI and BIOS as options. You must choose in UEFI and choose how you boot installs. Various settings in UEFI/BIOS may be required to enable correct boot mode. You do always want to boot in UEFI mode, but may not need nor want secure boot mode of UEFI.
Install instructions for dual booting in UEFI apply with any current version of Windows in UEFI mode & Ubuntu in UEFI mode. Very minor differences with newer Windows (same settings required) and Ubuntu versions.
Major Sections below:
Summary UEFI install instructions
Ubuntu UEFI install ISO Download link
Windows 10 or 8 pre-installed with UEFI & secure boot, Windows 10 upgrade from Windows 7 probably BIOS with MBR partitions. No UEFI system, but if newer hardware it may be UEFI.
Systems that only boot Windows from UEFI.
Boot-Repair Should only be required if issues, will not fix Windows. Great for Summary Report.
Partitioning - gpt required for UEFI
Boot but black screen/Video issues with nVidia or AMD, nomodeset
Additional Info
gpt partitioning
Two drive installs - both must be gpt partitioned
Backup - Windows & efi partition
UltraBooks with Intel SRT(Seen as RAID) and dual video
efi Menu cleanup
Windows 8/10 repair links
rEFInd Boot Manager may solve some issues
Un-installing
Examples by brand - Some users have posted details of how they did it.
Links to additional info & what UEFI is
Acronyms
Some good detail on UEFI & Windows settings needed - by tea for one
https://ubuntuforums.org/showthread....4#post14126324
Summary UEFI install instructions:
1. Back up Windows, your data, and make a Windows repair/recovery flash drive.
2. Download and create Ubuntu 64 bit installer, USB flash drive (new versions may not work with DVD).
3. Only use Windows own Disk Management tools to shrink Windows & reboot so it can run chkdsk.
4. Turn off Windows fast startup & bitlocker in Windows.
5. In UEFI turn off fast boot (different than fast start up) and often better but not required to turn off Secure boot (may be called "other" vs. "Windows"), only some may need CSM mode on (older Dell), but still select UEFI. Usually best to have UEFI only as boot mode.
6. Some UEFI may need you to turn on or allow USB boot, especially if Secure boot is on.
7. Boot Ubuntu live installer in UEFI live mode, and verify your system works ok. How you boot installer UEFI or BIOS is how it installs.
8. Install Ubuntu. links to screen shots below Only / (root) as ext4 & ESP required. But may want others. Only one ESP per drive and installer will auto find it, if existing.
new versions will install proprietary nVidia driver if Safe Boot option & choose to install third-party software options are checked. If UEFI Secure Boot on, user must provide UEFI secure boot key.
If nVidia or AMD video may need nomodeset boot parameter. Some brands also may need other boot parameters.
Create backup procedure for your Ubuntu data and configuration files.
If Issue with install, more info needed, or terms not understood, see info & links below:
Ubuntu UEFI install ISO
Also link on install guide, from Windows or Ubuntu
https://www.ubuntu.com/download/desktop
Easy way to create UEFI only bootable flash drive, did not work on some older verions.
https://ubuntuforums.org/showthread.php?t=2299040
Windows 8 or 10 pre-installed & secure boot
Since vendors also have bugs in UEFI, they are also updating regularly. Best to update to latest UEFI/BIOS version. You may have to make UEFI/BIOS settings changes also. New SSD also may need firmware updates.
You will need to use the 64 bit version of newest 22.04.x (best for very new hardware) and from the UEFI menu, boot the flash drive in UEFI mode. That way it will install in UEFI mode. Very new hardware needs latest version of Ubuntu and still may need ppa to update to even newer software/drivers not yet in distribution.
Systems need Windows fast start up (hibernation) and UEFI/BIOS fast boot or quick boot UEFI settings turned off. Vital for some systems. UEFI fast boot may prevent or make it difficult to get into UEFI menu. Some systems need password set to allow settings changes (Acer for one).
https://www.tenforums.com/tutorials/4189-fast-startup-turn-off-windows-10-a.html
https://www.eightforums.com/tutorials/6320-fast-startup-turn-off-windows-8-a.html
Use Windows Disk Tools to shrink Windows main partition, but not to create any new partitions, if installing on same drive. Reboot into Windows after shrink so it can run its repairs to its new size. Make sure Windows fast startup & bitlocker are off.
Backup efi partition and Windows partition before Install of Ubuntu.
Shows install with screen shots. Both BIOS purple accessibility screen & UEFI black grub menu screen - Good first link to follow for UEFI install details:
https://help.ubuntu.com/community/UEFI
How To Install Ubuntu Linux Alongside Windows 8 or 10 (UEFI)
https://askubuntu.com/questions/2218...dows-with-uefi
https://www.tecmint.com/install-ubuntu-alongside-with-windows/
Linux on UEFI: Installation Guides with screen shots
https://ubuntu.com/tutorials/install...allation-setup
https://www.rodsbooks.com/linux-uefi/
https://ubuntu.com/tutorials/install-ubuntu-desktop#1-overview
https://ubuntuhandbook.org/index.php/how-to-install-ubuntu/
Something Else or manual Install, essentially same for Windows 10 & Ubuntu 16.04.
https://www.dedoimedo.com/computers/dual-boot-windows-8-ubuntu.html
More info on Windows:
https://www.tenforums.com/
https://www.eightforums.com/
It is possible to install Ubuntu on UEFI systems with Secure Boot enabled (using signed versions of Shim, GRUB, and the Linux kernel). But best to use newest version to have latest software updates as UEFI fixes for newest hardware is more up to date in newer versions.
22.04 & 20.04 LTS Release Notes:
https://discourse.ubuntu.com/t/jammy...se-notes/24668
https://wiki.ubuntu.com/FocalFossa/ReleaseNotes
Enablement stack update schedules, newer kernels in LTS versions for newer systems
https://wiki.ubuntu.com/Kernel/Rolli...nablementStack
https://wiki.ubuntu.com/Kernel/LTSEnablementStack
UEFI systems now have multiple ways to boot - UEFI w/Secure boot, UEFI (secure boot off) and BIOS/CSM. Some UEFI clearly have all 3 settings, others may default. Some are not clear that a Windows boot setting in UEFI means secure boot and you need to select "Other" for UEFI only or CSM- UEFI Compatibility Support Module (CSM), which emulates a BIOS mode. Also the mode you select to boot USB installer may not be the default you have set in UEFI/BIOS. Make sure all boot settings are UEFI.
gpt(GUID)) partitioning
Required for UEFI, and for drives over 2TB.
You can also use gparted but must change default partitioning first.
Select gpt under device, advanced over msdos(MBR) default partitioning before starting. Note: erases entire drive.
Or use gdisk which is in repository, now standard in newer installs:
GPT fdisk Tutorial -srs5694 in forums
https://ubuntuforums.org/showthread.php?t=1439794
https://www.rodsbooks.com/gdisk/
sudo apt-get install gdisk
GPT Advantages (older but still valid) srs5694 post #2:
https://ubuntuforums.org/showthread.php?t=1457901
https://wiki.archlinux.org/index.php/GPT
https://wiki.archlinux.org/index.php...antages_of_GPT
Two Drive UEFI installs, Internal, external or flash drive
You must gpt partition in advance including ESP - efi system partition on second drive, then use Something Else to install.
https://askubuntu.com/questions/7269...te-hard-drives
https://askubuntu.com/questions/9137...-configuration
Grub default installs to first drive's ESP, you can either copy files from first drive to second drive's ESP, update entry in EFI and edit fstab. Or change default entry while installing. Still have to edit fstab after install so updates are to correct ESP.
https://bugs.launchpad.net/ubuntu/+s...y/+bug/1396379 See #23 & #26
Install Ubuntu in UEFI mode on second HDD without affecting first HDD
https://askubuntu.com/questions/7208.../722147#722147
https://ubuntuforums.org/showthread.php?t=2305876
https://askubuntu.com/questions/591193/install-ubuntu-alongside-win-8-1-on-separate-physical-drives-and-dual-boot
https://ubuntuforums.org/showthread.php?t=2192378
https://askubuntu.com/questions/7869.../942312#942312
UEFI dual boot two drives - HP
https://ubuntuforums.org/showthread.php?t=2072950
UEFI dual boot two drives see #14 on how edit UUID to Windows efi partiton
https://ubuntuforums.org/showthread.php?t=2031836
Two Drive installs or external drive - See also examples below
You must partition in advance with ESP on second drive and then see this work around in post 23. Still may need to update fstab with correct UUID.
https://bugs.launchpad.net/ubuntu/+s...y/+bug/1396379
Often easier to unplug or in UEFI turn off Windows drive. Then do a standard UEFI install to Ubuntu drive.
Or remove esp flag from Windows before install to second or external drive - Tim Richardson
https://askubuntu.com/questions/1698...056079#1056079
Both drives must be gpt partitioned. Best to include ESP - efi system partition as first partition on every gpt drive, even if booting from Windows efi partition. And Ubuntu's grub only installs to ESP on first drive usually sda or nvme0n1.
Once you are booting with UEFI, best to have all drives and larger external devices even larger flash as gpt partitioned with an efi partition first even if just for future use. May have to manually edit UUID of efi partition, but Boot-Repair updated for two drive installs.
And Ubuntu's UEFI grub only installs to the ESP on sda, or not the external drive and not to /EFI/Boot/bootx64.efi. For my PC UEFI full install to a flash drive I manually copied /EFI/ubuntu on sda's ESP to flash drive's ESP. Then copied it again to /EFI/Boot and renamed shimx64.efi to bootx64.efi. I then updated fstab to have correct UUID for ESP on external drive.
The version of grub in a full install is hard coded to find the rest of grub in /EFI/ubuntu so both copies are required. There are ways to directly install grub as bootx64.efi, but then you have to manually maintain grub.cfg.
Good advice on UEFI and two drive installs
https://askubuntu.com/questions/9137...-configuration
https://askubuntu.com/questions/1130...-physical-ssds
Details on full UEFI install to flash drive or any external drive.
https://ubuntuforums.org/showthread.php?t=2338836
Partitioning
New user with only 50GB for Linux only needs / (root) as ext4. And ESP if UEFI.
If more space then smaller / of 25 to 30GB & rest as /home. Or more advanced use data partition(s) for your data.
With UEFI, gpt partitioning is (almost) required. If multiple drives all bootable drives need to be gpt and best if data drives are also gpt in case later you want to make it bootable. With gpt there is no primary, extended, logical partitions as in MBR(msdos) nor the 4 primary partition limit.
You can only have one ESP/efi partition per drive (Ubuntu will share Windows ESP if dual booting on same drive) and with gparted you use the boot flag to assign it as the efi partition. No other partitions can have boot flag. Only if booting in BIOS mode with Ubuntu on gpt partitioned drive, you need a bios_grub partition.
Windows will only boot in UEFI mode so you cannot install Windows to gpt drive unless booting with UEFI.
I suggest 300-500MB efi partition - FAT32, 25 to30GB /(root) - ext4, and then either /home - ext4, or /mnt/data partition(s). But you cannot do data partitions as part of install.
If dual booting with Windows a shared NTFS data partition is also recommended.
https://help.ubuntu.com/community/DiskSpace
https://askubuntu.com/questions/743095/how-to-prepare-a-disk-on-an-efi-based-pc-for-ubuntu
UEFI update
https://fwupd.org/
UEFI/BIOS updates brand & model list, note for Dell with (uefi >= 0.6.2 & dell >= 0.7.3)
https://fwupd.org/lvfs/devicelist
Dell required update June 2021
https://www.phoronix.com/scan.php?page=home
Backup - Windows, data & efi partitions
Backup windows before install - post by Mark Phelps
https://ubuntuforums.org/showthread.php?t=2137439&p=12611710#post12611710
https://www.macrium.com/reflectfree.asp
Another suggestion by srs5694
https://www.runtime.org/driveimage-xml.htm
Microsoft Windows 7,8 & 10 reinstall/refresh
https://support.microsoft.com/en-us/...allation-media
Ubuntu backup
https://help.ubuntu.com/community/BackupYourSystem
https://help.ubuntu.com/community/Ca...BackupRecovery
https://help.ubuntu.com/community/rsync
Black Screen/ Video Modes
This usually required with AMD or nVidia. Newest versions now work better. And will let you install nVidia driver as part of install.
How to set NOMODESET and other kernel boot options in grub2 - both liveCD & first boot, but different
https://help.ubuntu.com/community/Grub2
https://ubuntuforums.org/showthread.php?t=1613132
Newer systems may have this setting:
Also turn off one Video mode or Intel settings in UEFI/BIOS like Intel NIC if USB flash not working.
Some Laptops need this in place of quiet splash:
acpi_osi=Linux acpi_backlight=vendor
Some laptops just have backlight set way down, press f key to make it brighter
Some new Intel may need above or this (usually not required with 16.04 or later):
i915.i915_enable_rc6=1
Or Force Intel Video mode as boot parameter in grub menu - change to your screen size
video=1280x1024-24@60
Ubuntu 20.04 has option to install proprietary drivers as part of install. If UEFI Secure Boot on, you then have to provide your own Secure Boot signing key for those drivers.
Also Ubuntu now has experimental ppa with newest nVidia drivers.
https://launchpad.net/~graphics-driv...ive/ubuntu/ppa
UltraBooks - Also see examples below Also see updated comment in post #5 below. Grub may correctly install now with 14.04 or later without much effort.
Ubuntu now installs with Intel RST on, but when grub sees the RAID grub will not install. So you have to turn the SRT off or set UEFI/BIOS to AHCI and remove the RAID meta data from the drives. Some install Ubuntu to SSD, others install to hard drive and turn SRT back on and have had it work.
Dell XPS 8920 & Nvidia GTX 1060 & PCIe M2 drive Raid change to AHCI
https://ubuntuforums.org/showthread.php?t=2360929
Some discussion of limits of new nVidia driver with some Optimus support
https://ubuntuforums.org/showthread.php?t=2142215
Intel Smart Response Technology
https://www.intel.com/p/en_US/support...ts/chpsts/imsm
Some general info in post #3
https://ubuntuforums.org/showthread.php?t=2071242
Uses larger SSD for both Intel SRT & Ubuntu
https://ubuntuforums.org/showthread.php?t=2129157&page=2
Ubuntu on hard drive, re-enable SRT post #19 details
https://ubuntuforums.org/showthread.php?t=2129157
If issues with RAID, disable the RAID (Change to AHCI unless RAID 0), it was using the Intel rapid management in UEFI and telling it to disable the acceleration or the use of the SSD. If you have a different system, just disable the RAID system then install Ubuntu. Once installed you can then re-enable it.
sudo dmraid -E -r /dev/sda
sudo dmraid -E -r /dev/sdb
Grub menu (# is comment)
# You can add this line to grub configuration or turn off the execute bit on 30_os-prober
gksudo gedit /etc/default/grub
GRUB_DISABLE_OS_PROBER=true
#or turn off executable bit
sudo chmod a-x /etc/grub.d/30_os-prober
# Then do:
sudo update-grub
# Edit descriptions used by Boot-Repair or remove entire boot stanza
sudo cp -a /etc/grub.d/25_custom /etc/grub.d/bkup25_custom
gksudo gedit /etc/grub.d/25_custom
#Then do:
sudo update-grub
UEFI menu clean up, delete old entries (UEFI saves entries in its NVRAM)
You first need to remove /EFI/ubuntu folder from efi(ESP) partition or else UEFI may add it back again. Best to fully backup efi partition before making any changes.
If you cannot do change from UEFI menu, you can from command line with efibootmgr.
# from live USB flash booted in UEFI mode and use efibootmgr
sudo apt-get install efibootmgr
sudo efibootmgr -v
ls /sys/firmware/efi/vars
The "-v" option displays all the entries so you can confirm you're deleting the right one, and then you use the combination of "-b ####" (to specify the entry) and "-B" (to delete it). Examples #5 is delete:, with Ubuntu you need sudo, others must be at root.
efibootmgr -b XXXX -B
Examples:
https://linux.die.net/man/8/efibootmgr
Really UEFI boot menu edits
https://askubuntu.com/questions/63610/how-do-i-remove-ubuntu-in-the-bios-boot-menu
Remove Duplicate Firmware Objects in Windows BCD and NVRAM
https://technet.microsoft.com/en-us/library/cc749510%28v=ws.10%29.aspx
Boot Repair -Also handles LVM, GPT, separate /boot and UEFI dual boot, but not most Windows 80 or 10 issues (use your Windows repair/recovery disk):
https://help.ubuntu.com/community/Boot-Repair
If issues, run Boot-Repair's summary report and post a new thread in Ubuntu forums.
https://ubuntuforums.org/newthread.php?do=newthread&f=326
Boot-Repair will convert a BIOS install to UEFI by uninstalling grub-pc, and installing grub-efi-amd64, if gpt partitioned.
It can update system to secure boot if you boot in secure boot mode. But then the grub entry for Windows may not work.
If unsure of which file is orginal Windows boot file - Windows UEFI install should have backup of bootmgfw.efi here:
C:\Windows\Boot\EFI\bootmgfw.efi from a working Windows x86_64 installation.
How to Create a Bootable UEFI USB Flash Drive for Installing Windows 10, Windows 8, or Windows 8.1
https://onetransistor.blogspot.ch/2014/09/make-bootable-windows-usb-from-ubuntu.html
https://www.eightforums.com/tutorials/15458-uefi-bootable-usb-flash-drive-create-windows.html
Windows 8/10 UEFI Repairs
How to: Create a Recovery Drive for reinstalling Windows 10 from Windows 10
https://answers.microsoft.com/en-us/windows/wiki/windows_10-win_upgrade/how-to-create-a-recovery-drive-for-reinstalling/58df9c7d-84de-4652-9952-8bac34abc6c5
Windows 10 repair disk
https://www.tenforums.com/tutorials/36083-system-repair-disc-create-windows-10-a.html
https://superuser.com/questions/460762/how-can-i-repair-the-windows-8-efi-bootloader
https://www.eightforums.com/tutorials/2269-system-recovery-options-boot-windows-8-a.html
Create Windows 8 Repair flash drive, must be FAT32 to boot in UEFI mode:
https://www.eightforums.com/tutorials/2855-system-repair-disc-create-windows-8-a.html
https://www.ghacks.net/2012/11/01/how-to-create-a-windows-8-system-repair-disc/
rEFInd - Boot Manager
rEFInd is a boot manager with graphical boot choices. UEFI and grub are also boot managers, but UEFI is limited and grub only has menu. You will still need grub2 as it is Ubuntu's boot loader but may want rEFInd. rEFInd also solves some issues with UEFI that will not correctly dual boot.
https://www.rodsbooks.com/refind/
https://wiki.archlinux.org/index.php...s#Using_rEFInd
https://www.rodsbooks.com/refind/secureboot.html
Now has a ppa to make it easy to install:
https://www.rodsbooks.com/refind/getting.html
Examples - some older, newer versions of Ubuntu should be easier as major updates to kernel, support software, video & UEFI drivers.
Dell often requires changing RAID to AHCI, may need UEFI update from Dell and SSD firmware update.
How to Install Ubuntu Linux on your Dell PC
https://www.dell.com/support/article...ell-pc?lang=en
Dell UEFI Dual boot instructions using Something Else
https://www.dell.com/support/article...ell-pc?lang=EN
Dell XPS 13 9360
https://ubuntuforums.org/showthread.php?t=2353288
Dell XPS 13 9560 install without issues
https://ubuntuforums.org/showthread.php?t=2357321
Dell XPS 8920 desktop GTX 1060, needed UEFI/BIOS update
https://ubuntuforums.org/showthread.php?t=2370434
Toshiba Satellite - turned Secure boot off in Boot-Repair update & UEFI
https://ubuntuforums.org/showthread.php?t=2346022
https://ubuntuforums.org/showthread.php?t=2317643
Screenshots of secure boot settings Asrock, Asus, HP, Acer
https://neosmart.net/wiki/disabling-secure-boot/
Haswell Laptop - Toshiba P50
https://ubuntuforums.org/showthread.php?t=2163854
acer aspire s7 Dual SSD RAID - [SOLVED] Installed Ubuntu on Pre- UEFI Win
https://ubuntuforums.org/showthread.php?t=2240043
All Acer require supervisor password & enable "trust" on Ubuntu/grub efi files. Acer Trust Settings - details:
https://ubuntuforums.org/showthread.php?t=2297947
https://ubuntuforums.org/showthread.php?t=2358003
https://ubuntuforums.org/showthread....7#post13341757
Many Asus seem to need pci=nomsi boot parameter
Problems Installing on ASUS F555U needed boot option pci=nomsi
https://ubuntuforums.org/showthread.php?t=2303665
Asus x555u w/o pci=nomsi - space issue on drive and runaway log files filling drive
https://ubuntuforums.org/showthread....2327103&page=3
ASUS Zenbook Prime UX32VD
https://www.phoronix.com/scan.php?page=article&item=asus_zenbook_ux301la&nu m=1
https://help.ubuntu.com/community/AsusZenbookPrime
HP to get into UEFI/BIOS menu - escape then f10 as soon as it starts.
https://h10025.www1.hp.com/ewfrf/wc/document?docname=c01443329&lc=en&cc=us&dlc=en&prod uct=5171079
HP Check if Customized UEFI settings available like this HP ProBook 4340
https://ubuntuforums.org/showthread....6#post13527216
https://askubuntu.com/questions/870453/live-boot-usb-install-of-16-04-fails-on-hp-pavilion-23?noredirect=1#comment1349777_870453
https://askubuntu.com/questions/666631/how-can-i-dual-boot-windows-10-and-ubuntu-on-a-uefi-hp-notebook
https://ubuntuforums.org/showthread.php?t=2185869
Dell UltraBook - Instructions & Details in Post #15 & 16 Devine Shine
https://ubuntuforums.org/showthread.php?t=2144853
Lenovo T540 works but UEFI settings critical or it may brick
https://docs.google.com/document/d/1...m0k/edit?pli=1
Lenovo Thinkpad E531 - turn off locked boot order setting in UEFI
https://ubuntuforums.org/showthread.php?t=2255746
Lenovo Ideapad Y500 LiveUSB Problem
https://ubuntuforums.org/showthread.php?t=2095063
Samsung Ativ Book 9 Plus UEFI Install Troubles - manual copy of grub to /EFI/Boot
https://ubuntuforums.org/showthread.php?t=2230919
Sony Vaio Pro 13 - To get into UEFI press this "Assist" button BEFORE starting
https://askubuntu.com/questions/458413/how-to-fix-dual-booting-windows-8-and-ubuntu-14-04-on-a-sony-vaio
[SOLVED] Trouble installing Xubuntu 14.04 on Toshiba Satellite P55-A (UEFI) - file rename
https://ubuntuforums.org/showthread.php?t=2247186
Phoenix SecureCore Tiano bios setup and secure boot is greyed out. You need to set a Supervisor Password in the Security tab
Samsung w/ Phoenix Tiano SecureCore
https://askubuntu.com/questions/760102/ubuntu-16-04-error-installing-grub/762267#762267
Systems that only boot Windows from UEFI & using efibootmgr to manage UEFI entries.
Per UEFI standard you should be able to boot any entry in UEFI boot menu. But some vendors have modified UEFI code to only boot the Windows efi file. The UEFI looks for the Windows file name and only boots it. (Note for Acer, it requires "trust" settings in UEFI)
Installing Grub for UEFI secure boot is only possible if you have booted your system using EFI with the 64bit version with secure boot on. A few systems will only boot with UEFI and secure boot on or with CSM (BIOS) if secure boot is off. Best to test system to see which modes it boots in. In secure boot mode it will only show/allow systems that have secure boot. You may have to change UEFI settings or set password to allow other devices to boot.
Backup entire efi partition before making changes.
A: Manually rename files efi hard drive boot files in efi partition /EFI/Boot
In Boot-Repair "Use the standard EFI file" Should do the same as these manual instrutions by copying shimx64.efi to /EFI/Boot/bootx64.efi for fallback or hard drive boot from UEFI menu.
Rename /efi/boot/bootx64.efi, copy shim or grub into /efi/boot and name it bootx64.efi Then boot harddrive entry in UEFI menu.https://www.tenforums.com/
Older rename of Windows efi file not recommended anymore. (old versions of Boot-Repair did rename the Windows efi file)
From live installer booted in UEFI mode, mount the efi partition on hard drive, lines with # are comments only: Mount ESP - efi system partition. check which partition is FAT32 with boot flag. Often sda1 or sda2 but varies.
# if your ESP is not sda1 change this to correct partition
sudo mount /dev/sda1 /mnt
only if /EFI/Boot not already existing, run the mkdir command,
sudo mkdir /mnt/EFI/Boot
sudo cp /mnt/EFI/ubuntu/* /mnt/EFI/Boot
# If new folder created, the bootx64.efi will not exist, skip backup command
sudo mv /mnt/EFI/Boot/bootx64.efi /mnt/EFI/Boot/bootx64.efi.backup
# make grub be hard drive boot entry in UEFI. Then boot hard drive entry in UEFI menu.
sudo mv /mnt/EFI/Boot/grubx64.efi /mnt/EFI/Boot/bootx64.efi
# You may need new hard drive entry (uses default of sda1 for ESP):
sudo efibootmgr -c -L "UEFI Hard drive" -l "\EFI\Boot\bootx64.efi"
# if not sda1 you must specify drive X with -d and partition Y with - p , see also man efibootmgr
sudo efibootmgr -c -g -d /dev/sdX -p Y -w -L "UEFI hard drive" -l '\EFI\Boot\bootx64.efi'
# confirm entries:
sudo efibootmgr -v
More examples of users who manually moved efi files
https://ubuntuforums.org/showthread.php?t=2101840
https://ubuntuforums.org/showthread.php?t=2219452
https://ubuntuforums.org/showthread.php?t=2221498&p=13012109#post13012109
B: Edit Windows BCD to make Ubuntu default (chg'd from grubx64 in case Secure Boot on)
bcdedit /set {bootmgr} path \EFI\ubuntu\shimx64.efi
https://coderwall.com/p/vfyqkg
UEFI NVRAM boot entries are cached in the BCD store
BCD has 1:1 mappings for some UEFI global variables
Any time {fwbootmgr} is manipulated, NVRAM is automatically updated
C: Use efibootmgr, if only Ubuntu install, not dual boot, install to make Windows UEFI description boot grub or shim file (Assumes default of sda1 for ESP, see links for added parameters for different drive or partitions) examples are with efibootmgr's default of sda1 for ESP, additional parameters required if not sda1:
sudo efibootmgr -c -L "Windows Boot Manager" -l "\EFI\ubuntu\shimx64.efi"
If you have Windows to restore Windows boot entry:
sudo efibootmgr -c -L "Windows Boot Manager" -l "\EFI\Microsoft\Boot\bootmgfw.efi"
D: Some install rEFInd which seems to be another workaround and has nice boot icons.
See section below on rEFInd
Other work arounds for UEFI that only boots Windows.
https://ubuntuforums.org/showthread.php?t=2234019
Restore or create new Ubuntu UEFI boot entry:
sdX is drive, Y is efi partition , if sda2 for example
sudo efibootmgr -c -L ubuntu -l "\EFI\ubuntu\shimx64.efi" -d /dev/sda -p 1
sudo efibootmgr -c -L "Ubuntu" -l "\EFI\ubuntu\shimx64.efi" -d /dev/nvme0n1 -p 1
Links to more Info
Background and details of what UEFI is.
https://wiki.archlinux.org/index.php/UEFI
Matthew Garrett's Blog
https://mjg59.dreamwidth.org/
Details on Ubuntu's shim with 12.10
https://falstaff.agner.ch/2012/12/12/secure-boot-implementation-of-ubuntu-12-10-quantal-quetzal/
They land alongside their unsigned variants in /boot with the file suffix “.efi.signed”.
Video Older versions still similar UEFI install process
Intel - Install Ubuntu 12.10 part 3 of series for new system w/secure boot, part one install keys, part 2 install Windows 8
https://www.youtube.com/watch?v=_cEwj8bBBC4
Acer Windows 8 Video on getting into UEFI
https://www.youtube.com/watch?v=QGiG1oljjZI
Dual-Boot Windows 8 and Ubuntu 12.10 (BIOS)
https://www.youtube.com/watch?v=wNCSbTyUzoM
Technical info on Legacy BIOS and UEFI AMI AptioMar 2012 - 20 MIn
https://www.youtube.com/watch?v=dRMIvY7BiL4
Somewhat simple explanation of UEFI:
https://www.happyassassin.net/2014/0...lly-work-then/
Acronyms:
UEFI https://wiki.archlinux.org/index.php/Unified_Extensible_Firmware_Interface
MOK - Machine Owner Key (MOK) https://wiki.ubuntu.com/UEFI/SecureBoot
ESP/efi - Efi System Partition for UEFI boot on gpt drive: https://en.wikipedia.org/wiki/EFI_System_partition
bios_grub - For BIOS boot on gpt drive: https://en.wikipedia.org/wiki/BIOS_boot_partition
BIOS - Basic Input/Output System https://en.wikipedia.org/wiki/BIOS # must be inside first 2TB of drive
CSM - UEFI Compatibility Support Module (CSM), which emulates a BIOS mode, only available with secure boot off.
Some vendors in 2020 are announcing CSM will be eliminated. Systems will be UEFI Class 3 (no CSM).
Secure Boot - https://wiki.ubuntu.com/SecurityTeam/SecureBoot
grub2 https://wiki.archlinux.org/index.php/GRUB2
gpt(GUID) https://en.wikipedia.org/wiki/GUID_Partition_Table
MBR(msdos) https://en.wikipedia.org/wiki/Master_boot_record
SSD https://wiki.archlinux.org/index.php/Solid_State_Drives
RAID https://en.wikipedia.org/wiki/RAID
LVM Logical Volume Management https://wiki.ubuntu.com/Lvm
LVM not recommended for newer users, but used with full drive encryption which erases entire hard drive.
Ubuntu https://en.wikipedia.org/wiki/Ubuntu_%28philosophy%29
https://www.ubuntu.com/about/about-ubuntu
Windows BCD - Boot Configuration Data https://docs.microsoft.com/en-us/win...d-line-options
Common Linux terms:
https://askubuntu.com/questions/691277/ubuntu-glossary-dictionary-of-commonly-used-terms
https://uefi.org/specifications/
Adv Reply
Re: UEFI Installing - Tips boot repair
Originally Posted by sam-c
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