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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1596469

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1596469

Title:
  [Bug]tpm initialization fails on x86

Status in intel:
  New
Status in linux package in Ubuntu:
  Incomplete
Status in linux source package in Xenial:
  In Progress

Bug description:
  When trying to test TPM with Ubuntu 16.04 on Intel x86_64 platform, there's tpm initialization failure found in kernel log:
  root@SKLU1-leg:~# dmesg | grep -i tpm
  [    0.000000] ACPI: SSDT 0x000000007FFE4000 0004D6 (v02 Intel_ Tpm2Tabl 00001000 INTL 20141107)
  [    0.000000] ACPI: TPM2 0x000000007FFE2000 000034 (v03                 00000000      00000000)
  [    2.532245] ima: No TPM chip found, activating TPM-bypass!
  [    3.489431] tpm_crb MSFT0101:00: can't request region for resource [mem 0xfed40040-0xfed4103f]
  [    3.489437] tpm_crb: probe of MSFT0101:00 failed with error -16

  which leads to tpm device missing under /dev:
  root@SKLU1-leg:~# ls -l /dev/tpm*
  ls: cannot access '/dev/tpm*': No such file or directory

  This error has been fixed with patch below, but not yet merged to upstream kernel:
  http://git.infradead.org/users/jjs/linux-tpmdd.git/commit/0af6e0a2da2e4fedaa2743333da438d3b879192b

  Patch 0af6e0a has dependency to this patch:
  http://git.infradead.org/users/jjs/linux-tpmdd.git/commit/3f944075e75e28c9cf1af8f82798398b
  So 0af6e0a has to be applied upon 3f94407, otherwise patch apply fails.

  I've verified with kernel 4.7-rc4 that above 2 patches can fix this TPM issue.
  So please Ubuntu team help on backporting these 2 patches into the kernel of their next release.

  PS, below are some information about Ubuntu & kernel & cpu info on my test server, for your reference:
  root@SKLU1-leg:~# lsb_release -a
  No LSB modules are available.
  Distributor ID:	Ubuntu
  Description:	Ubuntu 16.04 LTS
  Release:	16.04
  Codename:	xenial
  root@SKLU1-leg:~# uname -a
  Linux SKLU1-leg 4.4.0-21-generic #37-Ubuntu SMP Mon Apr 18 18:33:37 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

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