On Thu, Apr 7, 2022 at 2:54 AM Florian Weimer <fweimer@xxxxxxxxxx> wrote: > > * Chris Murphy: > > > On Tue, Apr 5, 2022 at 9:56 AM Florian Weimer <fweimer@xxxxxxxxxx> wrote: > >> > >> * Peter Robinson: > >> > >> > This is out of context here because you can disable Secure Boot but > >> > still use UEFI to make that work. You're trying to link to different > >> > problems together. > >> > >> I think there's firmware out there which enables Secure Boot > >> unconditionally in UEFI mode, but still has CSM support. > > > > The UEFI spec makes CSM and Secure Boot mutually exclusive. CSM > > enabled renders Secure Boot impossible. So I'm not sure how the > > firmware can simultaneously enforce Secure Boot, but then permit the > > loading of non-compliant bootloaders. > > I meant that without CSM, Secure Boot is always enabled. I don't know > if Fedora UEFI installations work on such systems when CSM is enabled. CSM enabled systems get a BIOS GRUB installation just as if it was a system without UEFI. The system gets an MBR, GRUB boot code in MBR, GRUB stage 2 in the MBR gap, etc. -- Chris Murphy _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
