![]() Reset your firmware to its default settings - Sometimes EFI boot manager lists become corrupted, causing symptoms like those you describe.(They're probably called "BIOS updates," although technically your firmware is not a BIOS.) After the update, reboot into Linux and try again. Check with the computer's (or motherboard's) manufacturer to find updates. Update your firmware - If the bug is in the firmware, updating it may fix the problem.I have several suggestions, but none is guaranteed to fix the problem: You're seeing a bug, and it's almost certainly not related to Secure Boot. What is wrong? How to make efibootmgr setting persistent? Where i did mistake (if any)? I have disabled it and GRUB have not problem with this. I have read that some people had problems with secure boot. After next boot to debian, efibootmgr too responses only Windows Boot Manager and GRUB. There are only GRUB and Windows Boot Manager. Then i added record to EFI via command efibootmgr -c -d /dev/sdb3 -p 1 -l \\EFI\\SYSLINUX\\syslinux.efi -L "SYSLINUX2"Įfiboot manager responded success and shows SYSLINUX2 as boot options but when i reboot computer (by reboot command) and goes to UEFI settings, there is no SYSLINUX2 option added. syslinux.cfg i wrote and contents is PROMPT 0 syslinux.efi and ldlinux.e64 i copied from syslinux-6.03.tar.gz downloaded from. Vmlinuz and initrd i copied from sdb4\boot and rename. I want to have syslinux on sdb3, I mounted that and copy these files to this partition at the location: /EFI/SYSLINUX/initrd.img I consider to use syslinux to boot to debian. I can change between then and thats working. In EFI order i can see Windows Boot Manager and GRUB. ![]() Sda2 - FAT32 - EFI partition where is Windows Boot Manager and GRUB I have 2 disks (/dev/sda and /dev/sdb) on UEFI laptop. ![]()
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