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[Bug 490487] Re: Enable iTPM support for lucid


This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
lucid' to 'verification-done-lucid'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!

** Tags added: verification-needed-lucid

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  Enable iTPM support for lucid

Status in “linux” package in Ubuntu:
  Fix Released

Bug description:
  [Summary below distilled from: https://wiki.ubuntu.com/iTPMSupport and

  Contemporary Lenovo and Dell laptops include a newer TPM chip (iTPM
  which is not well supported by Linux.


  The fundamental problem is that iTPM doesn't set the TPM_STS_DATA_EXPECT
  status bit when sending it a burst of data and the current kernel module
  considers that a failure. And there is a secondary problem that the
  Thinkpads have the chip in an ACPI configuration that, while standard,
  eludes the kernel's autoprobing.  Enterprise customers already relying on
  the TPM chip cannot move to newer laptops with the new iTPM chip because
  it is not supported by Linux.

  David Smith (~dds) has done a lot of work in this area. There are two
  kernel patches involved. The first has been merged into the mm tree. The
  second is being reworked.

    1: http://marc.info/?l=linux-kernel&m=125381794406624&w=2
    2: http://marc.info/?l=tpmdd-devel&m=125264268716691&w=2

  Need to track these and see if they have hit the 2.6.32 tree.

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