I've got it working now...
The manufacter hardcoded EFI paths and Labels on this machine....
I had to set it up like this:
See full list:
BIOS not seeing Ubuntu installed on Acer Aspire ES1-132. Can boot via grub cli
(Lots of info in the title so that other people with the same problem may find it.)
I bought an Acer Aspire ES1-132, knowing that installing Linux might be a…
askubuntu.com
Howto:
1. Install LibreELEC with installer.
2. Boot LiveCD (Ubuntu|gparted (smaller))
3. Open Terminal and do fdisk
4. Look where EFI partition is. In most case its mmcblk0p1. (On this machines)
5. Mount partition
6. cd into it
7. Create Linux folder there: mkdir Linux and go into the folder: cd Linux
8. Copy files (look where your EFI files are)
9. For "Linux"-Option you have to name the bootfile like this "BOOTX64.efi"
10. Reboot and be happy..