Dear Pascal and all, I just wanted to provide some feedback after having run grub-install to register my boot loader to the motherboard.
In short, it worked, finally. The longer version is that, after enabling UEFI, I had a hard time getting my hard drive being detected. What fixed the problem was to disable the RAID mode in the System setup and enable AHCI. The other thing that happened is that when I ran grub-install it reported that the system does not support BIOS variables. This scared me a little but now things seem to work OK, perhaps because the bootloader is seen as a removable device? Here is the output of efibootmgr: BootCurrent: 0002 Timeout: 0 seconds BootOrder: 0002,0001,0004,0003,0005,0006 Boot0001 Diskette Drive Boot0002* debian Boot0003* USB Storage Device Boot0004 CD/DVD/CD-RW Drive Boot0005* M.2 PCIe SSD Boot0006* UEFI: PM981 NVMe Samsung 1024GB, Partition 2 It feels to me some cleanup would be in order, but I am kind of shy about touching anything since things work now and it would be impossible to fix whatever would stop working. Is there a safe way to determine whether the BIOS varialbes are actually available / enabled? I really wish BIOSes could embed a screen reader. It's so painful and frustrating not being able to control this part of the system in an autonomous way. Sébastien.
