search for: efibootmgr

Morning all, I have a HP Envy dual boot system (Win8 for serious stuff, i.e. Train Sim and Flight Sim) and Centos 7 for everything else. In the past I've had the occasional problem where an update on the windows side has updated the UEFI boot sequence but using efibootmgr has always fixed it. On Friday I discovered that my HDD was failing so I tried using Clonezilla to move it on to a new SSD of the same size. Unfortunately the clone didn't work, failing half way through my main partition. Thankfully the Windows partitions and boot info cloned across so that...

Hello Chris, On Thu, 01 Feb 2018 17:00:03 +0000 Chris Murphy <lists at colorremedies.com> wrote: > You can to use efibootmgr for this. NVRAM boot entry is what changed, not > the contents of the EFI System partition. > > efibootmgr -v > > Will list all entries and Boot Order. You need to use --bootorder to make > sure the CentOS entry is first. Interesting.. thanks for your reply! Too bad I never ru...

...CD: If I mount /dev/sda2 on /media and have a look, this is the valid EFI filesystem, including the Fedora and Centos entries. If I try to mount /dev/sda6 on /media it looks to be a valid /boot filesystem. If I mount /dev/sda6 as /boot and mount /dev/sda2 as /boot/efi before running Jim's efibootmgr command will I fix the problem or will I stuff it beyond all recognition? [root at localhost /]# mount /dev/sda2 /media/ [root at localhost /]# cd /media/ [root at localhost media]# ll total 12 drwxr-xr-x. 7 root root 4096 Sep 14 12:20 EFI drwxr-xr-x. 2 root root 4096 Aug 15 10:24 System Volume...

Hi Jim, Thanks for this. I looked into what you said, and once happy I ran the command you gave. It appeared to work as it did not come up with any errors, and the output from efibootmgr showed 1) Centos had been added as an option and 2) it was the first in the boot sequence. However, when I rebooted the laptop went straight into Win8, and after rebooting back into KDE Live, the option is no longer there. This is the output after rebooting. [root at localhost liveuser]# efibo...

On Tuesday 28 May 2019 19:52:02 Jonathan Billings wrote: > I suggest running 'blkid' and 'efibootmgr -v', and double-check that > the UUID for the CentOS boot entry matches the UUID of the EFI disk. > > You can delete and recreate the boot entry with 'efibootmgr', which > will likely solve the problem. > > It depends on the UEFI implementation, but when all the boot...

...It was only after Fedora failed to boot that I realised that this was wrong. Some time ago I had replaced F21 with Centos 7 and the three Centos 7 options were the ones that should be available - plus the Windows 8 boot manager. I have managed to boot into a Centos 7 Live KDE image. In this ran efibootmgr which shows the same thing. I can fix the boot sequence, but that will not get me back the Centos entries. Can anyone suggest how I can do that? Gary [root at localhost ~]# efibootmgr BootCurrent: 0000 Timeout: 0 seconds BootOrder: 2002,0002,3002,0001,2001,2003 Boot0000* Internal CD/DVD ROM...

I have installed dom0 Wheezy 64 bit on Dell PowerEdge T310 with kernel from package and xen-unstable. System is in Uefi mode and booted with grub-efi-amd64. Booting without xen efibootmgr works, while with xen not, efivars kernel module is loaded but show this message: efibootmgr Fatal: Couldn''t open either sysfs or procfs directories for accessing EFI variables. Try ''modprobe efivars'' as root. If you need some additional info please notify me, thanks for...

...ra install, the current Centos install as well as the Windows install. When I chose the Centos install it showed the GRUB menu and booted into Centos without error. This confirms that the Centos entry in the EFI data is still valid. Once booted I then tried going through the process of running efibootmgr again. Once again, it looked to work perfectly, but for some reason the changes are not permenant, and if left alone, the laptop boots into Win8. I'm out of ideas now. Gary [root at gary ~]# efibootmgr -v BootCurrent: 0003 Timeout: 0 seconds BootOrder: 0002,3002,0000,0003,2001,2002,2003 Bo...

...the list for me. Thanks. > Is this "ArchLinux" entry equivalent to "\EFI\syslinux\syslinux.efi" > in your UEFI firmware? > Note: UEFI firmware is supposed to use (or show) backslash "\" as path > separator. You have a great point there. I redid the "efibootmgr" installation and instead of efibootmgr -c -d /dev/sdd -p 1 -l EFI\\syslinux\\syslinux.efi -L ArchLinux as I used originally (as documented in my OP), I put a (double) slash in front of "EFI", i.e., I now have efibootmgr -c -d /dev/sdd -p 1 -l \\EFI\\syslinux\\syslinux.efi -L ......

On Wed, Sep 14, 2016 at 9:06 AM, Gary Stainburn <gary at ringways.co.uk> wrote: > I don't know if this additional information helps. Looking at he efibootmgr > output, is the centos entry pointing to the right place? > > Also, any idea why the update isn't being make permenant? Probably because the specified file wasn't found by the firmware on partition 1, so it removed what it thinks is a bogus entry. Just a guess. > > Number...

...ux#Setup_on_EFI_systems is my distribution instructions on installing Syslinux. http://www.syslinux.org/wiki/index.php?title=Install#UEFI are your instructions. I have tried both instructions only to get a blank or black screen. Trying to make a bootable usb that will boot with efi so I can run efibootmgr. Just wondering which is correct, or should I uninstall gentoo's Syslinux, download it and compile it, and follow your website's instructions. Not having much luck in their forums.

On Thu, Feb 1, 2018 at 10:13 AM, wwp <subscript at free.fr> wrote: > Hello Chris, > > > On Thu, 01 Feb 2018 17:00:03 +0000 Chris Murphy <lists at colorremedies.com> wrote: > >> You can to use efibootmgr for this. NVRAM boot entry is what changed, not >> the contents of the EFI System partition. >> >> efibootmgr -v >> >> Will list all entries and Boot Order. You need to use --bootorder to make >> sure the CentOS entry is first. > > Interesting.. thanks for...

...; Morning all, > > I have a HP Envy dual boot system (Win8 for serious stuff, i.e. Train Sim > and Flight Sim) and Centos 7 for everything else. > > In the past I've had the occasional problem where an update on the windows > side has updated the UEFI boot sequence but using efibootmgr has always > fixed it. > > On Friday I discovered that my HDD was failing so I tried using Clonezilla > to move it on to a new SSD of the same size. Unfortunately the clone > didn't work, failing half way through my main partition. Thankfully the > Windows partitions and bo...

...ot plugged in. fstab was subsequently edited and the nfs related entries temporarily commented out. //------------------------------------------------------------------------------------------- The following rpms were reinstalled - it is not known if this was necessary - probably not. grub2-efi-x64 efibootmgr efivar-libs fwupdate-efi shim-x64 grub.cfg was re-created but has never been used. grub2-mkconfig -o ~/grub.cfg_post_2020_07_30 cp /boot/efi/EFI/centos/grub.cfg /boot/efi/EFI/centos/grub.cfg_pre_2020_07_30 The old grub.cfg has not been over written yet as the boot does not get that far! //------...

...ble. EM: Failed to open \EFI\BOOT\grubx64.efi - Not Found Failed to load image \EFI\BOOT\grubx64.efi: Not Found start_image() returned Not Found How could this occur because of an update and how to fix this? What I tried is booting from centos usb, chroot to /mnt/sysimage and gave command: efibootmgr --create --label CentOS --disk /dev/sda1 --loader "\EFI\centos\shim.efi" This gave no EM, but booting remains impossible. I have to say I don't know whether to try grub2 of efibootmgr commands. Any help would be very much appreciated. Greetings, J.

...the grub2-efi-modules packages aren't installed, so this may be an installer bug. | Boot off install media with boot parameter inst.rescue and choose all | the default options; this ought to assemble the file system per fstab, | and you can | | chroot /mnt/sysimage | yum reinstall grub2-efi | efibootmgr -v | grep efibootmgr /var/log/anaconda/program.log ## I think that's | right it might be anaconda.program.log though | | | It's really just reinstalling grub2-efi that should fix the problem, | the following two options are just information gathering in case the | reboot still doesn'...

Exactly what efibootmgr command are you using? Chris Murphy

...ms there is something in the UEFI (secure boot) logic that wants the original disk, even if everything is moved over. I ended up putting the original /dev/sda in. The machine boots and is using the new system disk (a raid array in degraded mode). What is the magic to fix this? I tried to run efibootmgr, but it wants a model named efivars loaded, but there is no such module available. What am I missing? -- Robert Heller -- 978-544-6933 Deepwoods Software -- Custom Software Services http://www.deepsoft.com/ -- Linux Administration Services heller at deepsoft.com -- Web...

At Mon, 28 May 2018 18:23:42 -0700 CentOS mailing list <centos at centos.org> wrote: > > On 05/28/2018 03:25 PM, Robert Heller wrote: > > I tried to run efibootmgr, but it wants a model named efivars loaded, but > > there is no such module available. > > That's interesting.?? Can you post the command and output where you see that? > > Also, post the output of "dmesg | grep efi:" and "ls /sys/firmware/efi/" newserve...

...; Is this "ArchLinux" entry equivalent to "\EFI\syslinux\syslinux.efi" > > in your UEFI firmware? > > Note: UEFI firmware is supposed to use (or show) backslash "\" as path > > separator. > > You have a great point there. > I redid the "efibootmgr" installation and instead of > > efibootmgr -c -d /dev/sdd -p 1 -l EFI\\syslinux\\syslinux.efi -L ArchLinux > > as I used originally (as documented in my OP), I put a (double) slash in > front > of "EFI", i.e., I now have > > efibootmgr -c -d /dev/sdd -p 1...