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tpm2-tools is commonly used with the resource manager, tpm2-abrmd - But it CAN be used without, E.G. by setting the TPM2TOOLS_TCTI_NAME environment variable to communicate directly with the kernel driver: export TPM2TOOLS_TCTI_NAME=device Either directly with the TPM device (/dev/tpmN) or through the in-kernel resource manager provided by Linux kernel since 4.12 (/dev/tpmrmN) For some use cases (E.G. initramfs) it makes sense to use tpm2-tools without abrmd, so remove the tpm2-abrmd select, and instead a note in the help text that it may be needed. Signed-off-by: Peter Korsgaard <peter@korsgaard.com> Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>