Comment 0 for bug 1810430

New hardware (AMD Threadripper 2920x with an ASRock X399 Taichi motherboard) and a clean 18.04.1 install. I purposefully turn on AMD fTPM in the UEFI as I would like to explore using this to secure my system. However after booting with this option no /dev/tpm device node exists and the kernel boot output now includes the following...

$ dmesg | grep -i tpm
[ 0.000000] ACPI: TPM2 0x000000007902E4D0 000034 (v04 AMD A M I 00000001 AMI 00000000)
[ 0.928120] tpm_crb MSFT0101:00: can't request region for resource [mem 0x7943a000-0x7943afff]
[ 0.928141] tpm_crb: probe of MSFT0101:00 failed with error -16
[ 1.090180] ima: No TPM chip found, activating TPM-bypass! (rc=-19)

I'm using the motherboard vendors latest issued UEFI firmware and am unable to locate any other examples of this issue on my hardware.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-modules-extra-4.15.0-29-generic 4.15.0-29.31
ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
Uname: Linux 4.15.0-43-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: kelvin 3554 F.... pulseaudio
 /dev/snd/controlC0: kelvin 3554 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Thu Jan 3 17:11:03 2019
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-43-generic root=UUID=dc67630f-0924-11e9-b9f2-7085c2b1c052 ro amd_iommu=force_isolation iommu=pt transparent_hugepage=never default_hugepagesz=1G hugepagesz=1G hugepages=8
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-43-generic N/A
 linux-backports-modules-4.15.0-43-generic N/A
 linux-firmware 1.173.2
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/14/2018
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P3.30
dmi.board.name: X399 Taichi
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP3.30:bd08/14/2018:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnX399Taichi:rvr:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.