Greetings , A new minimal install : 1. avoid mounting /dev/sdb2 as /boot/efi 2. create /dev/sda1 as EFI Sytem Partition mount point /boot/efi everyting else as reported initially . 1. At boot time [ with the DC in cd drive] linux starts Different boots abailable : opensuse 15.0 opensuse recover windows select opensuse 15 , it starts fine . The only issue is that without the install-CD in drive, the system boots directly in Windows . The Linux boot loader says Detect foreign OS and the option "hid the menu" is not checked out . How could I fix this issue ? For the time being I'm going to keep the install CD in the CD-drive . Thanks, Nick