From: Jason G. <jgu...@ob...> - 2014-02-03 22:10:58
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On Mon, Feb 03, 2014 at 09:51:51PM +0100, Peter Hüwe wrote: > > Could this be also a firmware or hardware issue? How could we rule these > > possibilities out? > Definitely. Can be anything from a TPM problem to a problem with the > SouthBridge, a timing problem or a too weak pullup. > Only thing I assume we can rule out is that it is a generic tpm driver > problem. It is likely a problem with the BIOS, or a problem with how Linux is tickling the suspend/resume (eg ACPI, etc). Unfortunately Lenovo is really the folks positioned to investigate this, they know what the control flow is supposed to be. The BIOS is supposed to startup the TPM upon resume, and the fact it left the interface seemingly disabled suggests it failed the resume process and left the TPM disabled. Presumably it all works properly in Windows? Once it has failed can you suspend/resume and bring the TPM back? Jason |