I get this on a Geminilake NUC after rebasing my maintainer trees: tpm tpm0: A TPM error (-1) occurred attempting the self test I checked the latest commit ID from drivers/char/tpm to make sure that I did not put anything broken to my last PR [1]. It works without issues. In addition [2] gives me an empty diff. Something outside of the TPM driver must have happened that breaks the driver. Any ideas? [1] commit 9488585b21bef0df1217e510c7134905d1d376a7 [2] git diff 9488585b21bef0df1217e510c7134905d1d376a7 master drivers/char/tpm/ /Jarkko