Well, no joy in Mudville. I disabled Secure Boot by deleted the PK key, which did indeed result in the motherboard BIOS recognizing that Secure Boot was disabled. And, it recognizes the NVMe drive as the boot device, indeed the only boot device, which is good. But ... despite all that, it still does not boot. I tried it with CSM on and CSM off, still no boot. Efibootmgr this time *did* list the NVMe drive as an EFI option (after the USB flash drive), but still no boot. Tried it with various options enabled and disabled, still no joy. Damned if I can figure it out. I feel like I'm getting closer ... but no way forward seems obvious. Any ideas? Any reason to think that another motherboard might be less difficult to get up and running? -- Peter King peter.king@utoronto.ca Department of Philosophy 170 St. George Street #521 The University of Toronto (416)-946-3170 ofc Toronto, ON M5R 2M8 CANADA http://individual.utoronto.ca/pking/ ========================================================================= GPG keyID 0x7587EC42 (2B14 A355 46BC 2A16 D0BC 36F5 1FE6 D32A 7587 EC42) gpg --keyserver pgp.mit.edu --recv-keys 7587EC42