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Message #46423
[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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https://bugs.launchpad.net/bugs/490487
Title:
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
https://blueprints.edge.launchpad.net/ubuntu/+spec/itpm-support]
Contemporary Lenovo and Dell laptops include a newer TPM chip (iTPM
which is not well supported by Linux.
http://en.wikipedia.org/wiki/Trusted_Platform_Module
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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