Originally Posted by colorpurple21859

Reinstalled fedora in efi mode. I probably could have used a usb to boot one of my hard drive systems in efi mode then reinstalled grub, or used the command line to reinsert efi variables into bios ram, but not up on that enough to try. My system is a fairly new hp laptop. The internal drive is GPT with windows 10 and 4-5 Linux distros installed on it with ubuntu as the bios default bootloader. I have the option on my system from the f-9 key to boot my hard drive in efi or legacy mode when legacy mode is enabled. I have done legacy installs before without no ill effect, but I usually select custom/something else partitioning. When I selected auto apparently something happened to the efi variables in bios. When I reinstalled fedora in efi mode, the ubuntu and windows 10 efi entries showed back up in the bios, but not slackware, Debian, or refind, strange.