Hi again, after some experiments I finally found a solution... There seems to be a bug in TPM2.0 firmware version (1.3.1.0) included in Lenovos UEFI image but they do not provide an update. I have extracted the firmware version 1.3.2.8 from Dell's XPS15 TPM2.0 firmware update and used this to replace the firmware in my Lenovo UEFI image. After flashing this version via UEFI Setup the TPM2.0 gets detected and now is fully working. WTF. For anyone having the same problem: binwalk, uefi-firmware-parser, uefipatch and flashrom are your friends ;-) Best regards Michael
