On 2/14/20 5:47 PM, Alex Guzman wrote: > I just tested with 5.6_rc1. The behavior is still present: > > > ERROR:tcti:src/tss2-tcti/tcti-device.c:290:tcti_device_receive() Failed > to read response from fd 3, got errno 1: Operation not permitted > ERROR:esys:src/tss2- > esys/api/Esys_GetCapability.c:307:Esys_GetCapability_Finish() Received > a non-TPM Error > ERROR:esys:src/tss2- > esys/api/Esys_GetCapability.c:107:Esys_GetCapability() Esys Finish > ErrorCode (0x000a000a) > ERROR: Esys_GetCapability(0xA000A) - tcti:IO failure > ERROR: Unable to run tpm2_getcap I tried to reproduce this, but I couldn't. Do you know what version of TSS are you using, and what is the configuration used to build it. Could you try to rebuild it with --enable-tcti-device-async=no and try that. Thanks, -- Tadeusz