Hi, Thanh Le Tran Ngoc wrote: > I tried many tools and ways to parse Debian 12 stable into bootable device
Did you put a Debian Live ISO onto a USB stick ? If not USB stick: What else stores the live ISO ? Which ISO image did you download ? (Exact URL please.) > It only see boot device if I turn off secure boot, fast boot and > turn on CSM support with UEFI. The EFI partition of debian-live-12.0.0-amd64-standard.iso looks like there is the microsoft-signed shim in /EFI/boot/bootx64.efi . So it seems at least to strive for Secure Boot compliance. Maybe it is about SBAT, which can revoke the signatures of buggy shims. A few months ago such a revocation happened. If your computer saw a younger operating system, especially one from Microsoft, then it might have decided to put your Live ISO's shim on the list of revoked signatures. See for example https://askubuntu.com/questions/1523438 Consider to ask at mailing list debian-l...@lists.debian.org which is in charge for problems around building Live ISOs. Maybe the people there know about Secure Boot problems with recent Live ISOs. Have a nice day :) Thomas
