** Description changed: - See also https://wiki.ubuntu.com/iTPMSupport and - https://blueprints.edge.launchpad.net/ubuntu/+spec/itpm-support + [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 + [[http://en.wikipedia.org/wiki/Trusted_Platform_Module|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. + + [[http://launchpad.net/~dds|David Smith]] has done a lot of + work in this area. There are two kernel patches involved. The + [[http://marc.info/?l=linux-kernel&m=125381794406624&w=2|first + one]] has been merged into the mm tree. The + [[http://marc.info/?l=tpmdd-devel&m=125264268716691&w=2|second one]] + is being reworked.
** Description changed: [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 - [[http://en.wikipedia.org/wiki/Trusted_Platform_Module|TPM chip]] (iTPM) + Contemporary Lenovo and Dell laptops include a newer TMP chip (iTMP 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. - [[http://launchpad.net/~dds|David Smith]] has done a lot of - work in this area. There are two kernel patches involved. The - [[http://marc.info/?l=linux-kernel&m=125381794406624&w=2|first - one]] has been merged into the mm tree. The - [[http://marc.info/?l=tpmdd-devel&m=125264268716691&w=2|second one]] - is being reworked. + 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. -- Please ensure the iTPM is supported by Lucid's kernel https://bugs.launchpad.net/bugs/490487 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
