@Adam Conrad (adconrad) : thanks for the updated packages. Seems to be solved now on my laptop. My laptop can now successfully enable TPM and Secure boot at the same time during boot
HP-EliteBook-820-G4 ~> dmesg|egrep 'ecure|tpm|TPM' [ 0.000000] efi: ACPI=0xd9ffe000 ACPI 2.0=0xd9ffe014 TPMFinalLog=0xd9f76000 SMBIOS=0xd9765000 SMBIOS 3.0=0xd9763000 MEMATTR=0xd63c0018 ESRT=0xd9766b18 TPMEventLog=0xc50a8018 [ 0.000000] secureboot: Secure boot enabled [ 0.000000] Kernel is locked down from EFI secure boot; see man kernel_lockdown.7 [ 0.016255] ACPI: TPM2 0x00000000D9FEB000 000034 (v03 HPQOEM EDK2 00000002 01000013) [ 4.068308] tpm_tis MSFT0101:00: 2.0 TPM (device-id 0x1B, rev-id 16) [ 4.158924] integrity: Loaded X.509 cert 'Hewlett-Packard Company: HP UEFI Secure Boot 2013 DB key:<restricted> HP-EliteBook-820-G4:~$ apt-cache policy grub2-common grub2 grub2-common: Installed: 2.04-1ubuntu12.1 Candidate: 2.04-1ubuntu12.1 Version table: *** 2.04-1ubuntu12.1 100 100 /var/lib/dpkg/status 2.04-1ubuntu12 500 500 http://de.archive.ubuntu.com/ubuntu eoan/main amd64 Packages grub2: Installed: 2.04-1ubuntu12.1 Candidate: 2.04-1ubuntu12.1 Version table: *** 2.04-1ubuntu12.1 100 100 /var/lib/dpkg/status 2.04-1ubuntu12 500 500 http://de.archive.ubuntu.com/ubuntu eoan/universe amd64 Packages $ uname -a HP-EliteBook-820-G4 5.3.0-21-generic #22-Ubuntu SMP Tue Oct 29 22:55:51 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1848892 Title: "error: Unknown TPM error." after upgrading to grub 2.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1848892/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs