PROBLEM : CAN NOT CHANGE BOOT OPTION FROM WINDOWS (internal drive) TO UBUNTU (external drive) SOLUTION  - Step 1 :  Open Bios setting. (Press F2)- Step 2 : Navigate to "Boot" menu.- Step 3 : Open "Select a File System" submenu and select a drive by pressing Enter.- Step 4 : Add the efi file. Here is how to do it :               For a Windows Drive the path is "EFI/Microsoft/Boot/bootmgfw.efi".              For an Ubuntu Drive the path is "EFI/ubuntu/shimx64.efi"  After adding the efi file of the operating system (Don't be afraid of not showing up) that you want to run at the beggining just save the changes and exit.  Now enter again the bios settings and you should see at UEFI BOOT: the drive that you chose.
Hello and thanks in advance, I made a bootable external hard drive with ubuntu and even though it's being detected and I CAN boot it from BOOT MANAGER, it is not being detected/shown as a boot option inside the BIOS. Here you can see the Boot manager: [IMAGE] and here you can see the boot option in the BIOS:  [IMAGE] I wanted to make it the default boot option (but I can't since it's not being shown in the BIOS) because it's my default operating system and every time I open my laptop I have to tap F12 in order to open the Boot Manager and choose it from there.How can I make it my default option in the BIOS?Am I missing something? Is it something from my side?  Thanks again for your time.
Inspiron 7405 2-in-1, boot option for my external drive