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howtos:slackware_admin:linux_kernel_options_for_uefi_and_elilo [2014/07/06 02:11 (UTC)]
metaschima [My UEFI settings were reset and I can't boot, or planning ahead to avoid surprises] New section added
howtos:slackware_admin:linux_kernel_options_for_uefi_and_elilo [2019/05/08 19:18 (UTC)]
hwpfeil [Using the new EFI variable filesystem] Fixed linkrot for efibootmgr
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 In order to use the new EFI variable filesystem interface, you need to remove the old ''​efibootmgr''​ program and replace it with a new one that supports the EFI variable filesystem. In order to use the new EFI variable filesystem interface, you need to remove the old ''​efibootmgr''​ program and replace it with a new one that supports the EFI variable filesystem.
   - Download and install: https://​github.com/​vathpela/​efivar   - Download and install: https://​github.com/​vathpela/​efivar
-  - Download and install: https://​github.com/​vathpela/efibootmgr/​tree/​libefivars+  - Download and install: https://​github.com/​rhboot/efibootmgr
   - Run:<​code>​   - Run:<​code>​
 modprobe efivarfs modprobe efivarfs
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 ==== My UEFI settings were reset and I can't boot, or planning ahead to avoid surprises ==== ==== My UEFI settings were reset and I can't boot, or planning ahead to avoid surprises ====
 This can happen either after updating the UEFI firmware or after replacing the CMOS battery. There are three main ways to fix it: This can happen either after updating the UEFI firmware or after replacing the CMOS battery. There are three main ways to fix it:
-  - Probably the easiest and most convenient way is to use the default boot location. Note that some UEFI firmwares do NOT support the default boot location, so this will not work. However, if it does, you won't have to worry about the system not booting again. To do this you can boot into the Slackware install DVD, mount the EPS and copy the files to the following places:+  - Probably the easiest and most convenient way is to use the default boot location. Note that some UEFI firmwares do NOT support the default boot location, so this will not work. However, if it does, you won't have to worry about the system not booting again. To do this you can boot into the Slackware install DVD, mount the ESP and copy the files to the following places:
     - ''​elilo.efi''​ -> ''/​EFI/​boot/​bootx64.efi''​     - ''​elilo.efi''​ -> ''/​EFI/​boot/​bootx64.efi''​
     - ''​elilo.conf''​ -> ''/​EFI/​boot/​elilo.conf''​     - ''​elilo.conf''​ -> ''/​EFI/​boot/​elilo.conf''​
     - ''​vmlinuz''​ -> ''/​EFI/​boot/​vmlinuz''​     - ''​vmlinuz''​ -> ''/​EFI/​boot/​vmlinuz''​
   - You can boot into the Slackware install DVD, run through the menus, and reinstall elilo.   - You can boot into the Slackware install DVD, run through the menus, and reinstall elilo.
-  - You can download and install one of the following EFI shells to the root directory of your EPS (that is ''/''​ NOT ''/​EFI''​).+  - You can download and install one of the following EFI shells to the root directory of your ESP (that is ''/''​ NOT ''/​EFI''​).
     - [[https://​svn.code.sf.net/​p/​edk2/​code/​trunk/​edk2/​ShellBinPkg/​UefiShell/​X64/​Shell.efi|This version supports only UEFI version 2 and up]]     - [[https://​svn.code.sf.net/​p/​edk2/​code/​trunk/​edk2/​ShellBinPkg/​UefiShell/​X64/​Shell.efi|This version supports only UEFI version 2 and up]]
     - [[http://​dl.dropbox.com/​u/​17629062/​Shell2.zip | This version may support earlier UEFI versions]]     - [[http://​dl.dropbox.com/​u/​17629062/​Shell2.zip | This version may support earlier UEFI versions]]

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