Delays are observed on encrypted systems and preboot authentication is enabled.
Common to all systems reporting the issue is that each system was upgraded to the Intel SGX platform service version 2.1.100.46245 in November 2018.
MfeEpe.log records the following errors:
CoreCrypto Checking if this machine supports the Software Guard Extensions by attempting to initialise an enclave
ERROR, Service Control Manager, The AESMService service terminated unexpectedly. It has done this 1 time(s). 41 00 45 00 53 00 4D 00 53 00 65 00 72 00 76 00 69 00 63 00 65 00 00 00
ERROR, Service Control Manager, Intel® SGX AESM service terminated unexpectedly. It has done this 2 time(s). 41 00 45 00 53 00 4D 00 53 00 65 00 72 00 76 00 69 00 63 00 65 00 00 00
MfeEpe.log: 20:54:45 Driver Session notification: EPEPC_DRIVER_SESSION_STANDBY
MfeEpe.log: 20:54:48 Driver Session notification: EPEPC_DRIVER_SESSION_S3 *** Reordered slightly
MfeEpe.log: 20:55:11 CoreCrypto Successfully created and initialized enclave
