Dear Steve, I try to deliver missing informations.
> Can you get in to the system? I'm guessing (hoping!) just by disabling > SB for now. Fortunately, that is possible. > Then please do a listing of the EFi System Partition and > show us what boot variables are set: > # ls -lR /boot/efi /boot/efi: insgesamt 4 drwx------ 4 root root 4096 Mär 7 2016 EFI /boot/efi/EFI: insgesamt 8 drwx------ 2 root root 4096 Jul 1 18:04 BOOT drwx------ 2 root root 4096 Jul 1 18:04 debian /boot/efi/EFI/BOOT: insgesamt 3968 -rwx------ 1 root root 1322936 Jul 1 18:04 BOOTX64.EFI -rwx------ 1 root root 1206824 Jul 1 18:04 fbx64.efi -rwx------ 1 root root 1529200 Jul 1 18:04 grubx64.efi /boot/efi/EFI/debian: insgesamt 5208 -rwx------ 1 root root 108 Jul 1 18:04 BOOTX64.CSV -rwx------ 1 root root 1206824 Jul 1 18:04 fbx64.efi -rwx------ 1 root root 126 Jul 1 18:04 grub.cfg -rwx------ 1 root root 1529200 Jul 1 18:04 grubx64.efi -rwx------ 1 root root 1261192 Jul 1 18:04 mmx64.efi -rwx------ 1 root root 1322936 Jul 1 18:04 shimx64.efi > # efibootmgr -v BootCurrent: 0000 Timeout: 1 seconds BootOrder: 0000,0008,0009,000A Boot0000* debian HD(1,GPT,ce8d01bc-8e1e-4bab-bd3f-10a56a1346cd,0x800,0x100000)/File(\EFI\debian\shimx64.efi) Boot0008* UEFI : LAN : IP4 Intel(R) 82579V Gigabit Network Connection PciRoot(0x0)/Pci(0x19,0x0)/MAC(4c72b926a1c7,0)/IPv4(0.0.0.00.0.0.0,0,0)AMBO Boot0009* UEFI : LAN : IP6 Intel(R) 82579V Gigabit Network Connection PciRoot(0x0)/Pci(0x19,0x0)/MAC(4c72b926a1c7,0)/IPv6([::]:<->[::]:,0,0)AMBO Boot000A* UEFI : SATA : PORT 6G 0 : SAMSUNG SSD 830 Series : PART 0 : OS Bootloader PciRoot(0x0)/Pci(0x1f,0x2)/Sata(0,65535,0)/HD(1,GPT,ce8d01bc-8e1e-4bab-bd3f-10a56a1346cd,0x800,0x100000)AMBO # umount /boot/efi (if that should be of interest) # ls -lR /boot/efi /boot/efi: insgesamt 4 drwxr-xr-x 4 root root 4096 Mär 7 2016 EFI /boot/efi/EFI: insgesamt 8 drwxr-xr-x 2 root root 4096 Feb 23 2018 BOOT drwxr-xr-x 2 root root 4096 Feb 23 2018 debian /boot/efi/EFI/BOOT: insgesamt 128 -rwx------ 1 root root 131072 Jun 29 06:15 BOOTX64.EFI /boot/efi/EFI/debian: insgesamt 128 -rwx------ 1 root root 131072 Jun 29 06:15 grubx64.efi The exact error message during booting with SB on is: Image Autorization Fail. System cannot boot to this device due to Security Violation. Press Enter key to continue. Booting the live image like https://cdimage.debian.org/cdimage/weekly-live-builds/amd64/iso-hybrid/debian-live-testing-amd64-xfce.iso with SB on is also not possible (actually I teststed last week's build). Win 10 by installer DVD is (and long time ago an installed system on (another) HDD was) no problem with SB on. Note, I have not a dual boot system or something like that, solely Buster is on my system. # gdisk -l /dev/sda GPT fdisk (gdisk) version 1.0.3 Partition table scan: MBR: protective BSD: not present APM: not present GPT: present Found valid GPT with protective MBR; using GPT. Disk /dev/sda: 1000215216 sectors, 476.9 GiB Model: SAMSUNG SSD 830 Sector size (logical/physical): 512/512 bytes Disk identifier (GUID): 1F83AB09-033C-4FA1-80CB-8DD29163E919 Partition table holds up to 128 entries Main partition table begins at sector 2 and ends at sector 33 First usable sector is 34, last usable sector is 1000215182 Partitions will be aligned on 2048-sector boundaries Total free space is 2669 sectors (1.3 MiB) Number Start (sector) End (sector) Size Code Name 1 2048 1050623 512.0 MiB EF00 2 1050624 933314559 444.5 GiB 8300 3 933314560 1000214527 31.9 GiB 8200 # sgdisk --info=1 /dev/sda Partition GUID code: C12A7328-F81F-11D2-BA4B-00A0C93EC93B (EFI System) Partition unique GUID: CE8D01BC-8E1E-4BAB-BD3F-10A56A1346CD First sector: 2048 (at 1024.0 KiB) Last sector: 1050623 (at 513.0 MiB) Partition size: 1048576 sectors (512.0 MiB) Attribute flags: 0000000000000000 Partition name: '' Thank you again for your interest and commitment! Chris
