Bug#1024395: grub-efi-amd64-signed: related to #1024447?

[Garrett McLean]

Package: grub-efi-amd64-bin
Version: 1+2.06+3~deb11u4
Followup-For: Bug #1024395

Dear Maintainer,

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Hello,

Chiming in to say that I too am not seeing my mok in
mokutil --list-enrolled, which is strange because the drivers are
definitely signed, loaded and working just swell with sb enabled.

Also: when I select my stable installation on the grub menu, the screen turns
mostly black and I see something about about an efi stub and secure boot
being enabled. After a few seconds of this, kernel messages appear as normal.

GRUB_GFXMODE and GRUB_GFXPAYLOAD_LINUX both seem to be ignored, or at
least, don't display the requested resolution.

videoinfo and videotest are "prohibited due to sb policy" (I paraphrase,
but that's the gist).

And, as in #1024447, I see ?s instead of lines bordering the grub menu.

Disabling sb fixes all these errors.

-- System Information:
Debian Release: 11.5
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 5.10.0-19-amd64 (SMP w/12 CPU threads)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages grub-efi-amd64-signed depends on:
ii  grub-common  2.06-3~deb11u4

Versions of packages grub-efi-amd64-signed recommends:
ii  shim-signed  1.38+15.4-7

grub-efi-amd64-signed suggests no packages.

Versions of packages grub-efi-amd64-bin depends on:
ii  grub-common  2.06-3~deb11u4

Versions of packages grub-efi-amd64-bin recommends:
ii  efibootmgr  17-1

-- no debconf information