@Adam Conrad (adconrad) : Thanks for this updated package on proposal.
No more problems to boot with this package on my laptop : ASUS GL553VE

$ uname -a
Linux ub-eric 5.3.0-19-generic #20-Ubuntu SMP Fri Oct 18 09:04:39 UTC 2019 
x86_64 x86_64 x86_64 GNU/Linux

$ dmesg | grep -i -e secure -e tpm
[    0.000000] efi:  TPMFinalLog=0x7aefb000  ACPI 2.0=0x7aa93000  
ACPI=0x7aa93000  SMBIOS=0x7b2ec000  SMBIOS 3.0=0x7b2eb000  ESRT=0x789cd518 
[    0.000000] secureboot: Secure boot could not be determined (mode 0)
[    0.014858] ACPI: TPM2 0x000000007AACDBC0 000034 (v03        Tpm2Tabl 
00000001 AMI  00000000)
[    0.765919] tpm_crb MSFT0101:00: [Firmware Bug]: ACPI region does not cover 
the entire command/response buffer. [mem 0xfed40000-0xfed4087f flags 0x200] vs 
fed40080 f80
[    0.765937] tpm_crb MSFT0101:00: [Firmware Bug]: ACPI region does not cover 
the entire command/response buffer. [mem 0xfed40000-0xfed4087f flags 0x200] vs 
fed40080 f80

$ apt-cache policy grub2-common grub-efi-amd64-signed
grub2-common:
  Installé : 2.04-1ubuntu12.1
  Candidat : 2.04-1ubuntu12.1
 Table de version :
 *** 2.04-1ubuntu12.1 500
        500 http://fr.archive.ubuntu.com/ubuntu eoan-proposed/main amd64 
Packages
        100 /var/lib/dpkg/status
     2.04-1ubuntu12 500
        500 http://fr.archive.ubuntu.com/ubuntu eoan/main amd64 Packages
grub-efi-amd64-signed:
  Installé : 1.128.1+2.04-1ubuntu12.1
  Candidat : 1.128.1+2.04-1ubuntu12.1
 Table de version :
 *** 1.128.1+2.04-1ubuntu12.1 500
        500 http://fr.archive.ubuntu.com/ubuntu eoan-proposed/main amd64 
Packages
        100 /var/lib/dpkg/status
     1.128+2.04-1ubuntu12 500
        500 http://fr.archive.ubuntu.com/ubuntu eoan/main amd64 Packages

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https://bugs.launchpad.net/bugs/1848892

Title:
  "error: Unknown TPM error." after upgrading to grub 2.04

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