Messages in this thread |  | | From | James Ettle <> | Subject | [BISECTED] tpm CLKRUN breaks PS/2 keyboard and touchpad on Braswell system | Date | Mon, 11 Dec 2017 19:37:29 +0000 |
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Hello,
[First: Apologies if cross-posting from Kernel.org BZ is bad form; my distro BZ advised I post this to your mailing list as well.]
Situation: enabling TPM on a Clevo W510LU with an Intel N3160 CPU breaks PS/2 keyboard and mouse. They just don't respond until after a suspend/resume cycle, and after that they later stop after a while.
I have confirmed this by blacklisting tpm modules. I noticed this first with kernel 4.13, and have bisected it down to:
5e572cab92f0bb56ca1e6e5ee4d807663a7ccbad is the first bad commit commit 5e572cab92f0bb56ca1e6e5ee4d807663a7ccbad Author: Azhar Shaikh <azhar.shaikh@intel.com> Date: Sun Jun 18 19:17:59 2017 -0700
tpm: Enable CLKRUN protocol for Braswell systems
To overcome a hardware limitation on Intel Braswell systems, disable CLKRUN protocol during TPM transactions and re-enable once the transaction is completed.
Signed-off-by: Azhar Shaikh <azhar.shaikh@intel.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: James Morris <james.l.morris@oracle.com>
:040000 040000 5437c91886cb62c497255f2c60dbedd7268ab50d 1863a1738ded35a817aad52f9f2b451bd43623d7 M drivers
Currently in Kernel.org bugzilla 197287.
Please let me know if you need any further info.
Many thanks, James.
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