Comment 0 for bug 1892827

[Summary] device doesn't boot with kernel older than v5.7.7 on USB key

[Steps to reproduce]
1. Try to boot a green installation of Ubuntu Focal on a USB key.

[Expected result]
Boot up normally.

[Actual result]
Stuck at "loading initial ramdisk". With "earlycon=efifb", more debug messages for EFI are dumpped. Last call trace as:

  RIP: 0010:efi_tpm_eventlog_init+0x1aa/0x2a2
  ...
  Call Trace:
   efi_config_parse_tables+0x12d/0x213
   efi_init+0x218/0x36b
   ? e820__print_table+0x65/0x6e
   setup_arch+458/0xa84

[Failure rate]
10/10

[Additional information]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ea3cdcaa43b08c9a747639f545b0ed5cca47f87e ("efi/tpm: Verify event log header before parsing") fixes in 6b0326190205 ("efi: Attempt to get the TCG2 event log in the boot stub").

The fix is in linux-5.7.y and v5.8-rc3, and focal 5.4 and oem-5.6 are affected.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.8.0-16-generic 5.8.0-16.17
ProcVersionSignature: Ubuntu 5.8.0-16.17-generic 5.8.0
Uname: Linux 5.8.0-16-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.6
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/hwC0D2', '/dev/snd/pcmC0D5p', '/dev/snd/pcmC0D4p', '/dev/snd/pcmC0D3p', '/dev/snd/pcmC0D1c', '/dev/snd/pcmC0D1p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CasperMD5CheckResult: skip
Date: Tue Aug 25 02:51:58 2020
InstallationDate: Installed on 2020-07-21 (35 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: Dell Inc. Inspiron 3500
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-16-generic root=UUID=7c53c615-c466-43d7-9ca3-f8b8d895b7b0 ro initcall_debug debug
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-5.8.0-16-generic N/A
 linux-backports-modules-5.8.0-16-generic N/A
 linux-firmware 1.187.2
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/05/2020
dmi.bios.release: 0.4
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 0.4.3
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr0.4.3:bd08/05/2020:br0.4:svnDellInc.:pnInspiron3500:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct10:cvr:
dmi.product.family: Inspiron
dmi.product.name: Inspiron 3500
dmi.product.sku: 0A25
dmi.sys.vendor: Dell Inc.