Well, I had KaOS some time ago to test, with grub install, I liked this OS so I recently returned but with a uefi installation. The OS boot without problems but I have not boot menu. I have Windows 10, and I just install the linux-next kernell too but I can not choise any aption without boot-menu. can anyone help me pls?

PS: English is not my native languaje, sorry If I have mistakes.

If Windows 10 still boots as usual that means you did not reuse the existing EFI partition for the KaOS install (as instructed to you in the Installer & Guide provided in live mode).
You can see the new boot menu in your systems UEFI-BIOS. Enter it by using F11 or F12 during boot up (or whatever key your motherboard uses for boot menu). Select the "Systemd Boot" and you will get the systemd-boot menu, but this one of course will not have the Windows 10 entry.

Windows 10 not boot, unless I choose it from the boot-menu (F11), sorry maybe is that I have not explained well, my English is regular, I have not systemd-boot menu when I boot my PC, KaOS starts directly without menu.

You need to uninstall syslinux and than install refind-efi

su
pacman -Rns syslinux
pacman -Sy refind-efi
refind-install
reboot

And there you'll have menu with windows 10 and KaOs

  • demm replied to this.

    Asuna
    There is no syslinux used for UEFI bootloader, so no idea why you would post that. Neither is it needed AT ALL to use refind-efi.
    Syslinux is ONLY used in Live mode for BIOS systems, for installed BIOS, it is GRUB.
    Default systemd-boot automatically adds Windows IF the same EFI partition is used.

      Well, I just fix my problem with systemd-boot menu, I had reinstall KaOS in other hard-disk, I had 1 hard-disk (500 Gb) to Kaos and Windows 10, now I have 2 hard-disk, one for Windows (500 Gb) and other to Kaos (200 Gb). Now I get Systemd-boot menu but now I have not the opction to run Windows 10 in the menu.

      Ty for the help, I go to try fix it. If I have troubles I will start a new thread.

      Tyvm.