Re: fbx64.efi hangs after Debian 10.10 shim update

[Pascal Hambourg <pascal@plouf.fr.eu.org>]

Le 26/06/2021 à 10:35, Pascal Hambourg a écrit :
> > > > After the latest shim update which ran grub-install and installed 
> > > > the new
> > > > /boot/efi/EFI/BOOT/fbx64.efi, UEFI boot hangs with no error message, 
> > > > only the HP logo, and GRUB does not show up.
> > > >
> > > > Using "Boot from EFI file" in the firmware boot menu, it appears that :
> > > > - grubx64.efi (from either EFI\debian or EFI\BOOT) works
> > > > - shimx64.efi (from EFI\debian) works
> > > > - BOOTX64.efi (from EFI\BOOT) hangs
> > > > - fbx64.efi (from either EFI\debian or EFI\BOOT) hangs
(...)
> The firmware has two UEFI boot modes : Hybrid (with CSM) and Native 
> (without CSM). In hybrid mode, secure boot is disabled. In native mode, 
> secure boot can be enabled or disabled.
>
> Until now I always used hybrid mode which allows either EFI and legacy 
> BIOS boot. I discovered that the issue happens only in hybrid mode, not 
> in native mode.
And now I found out that fbx64.efi hangs only when a "debian" (or 
whatever name is defined in \EFI\*\BOOTX64.CSV) EFI boot entry exists.