P.S: John's complete output is: # /usr/sbin/john --format=gpg-opencl […] Device 0: AMD REDWOOD Build log: � Local worksize (LWS) 64, Global worksize (GWS) 8192 Loaded 1 password hash (gpg-opencl, OpenPGP / GnuPG Secret Key [SHA1 OpenCL]) Will run 2 OpenMP threads LLVM triggered Diagnostic Handler: unsupported call to function S2KItSaltedSHA1Generator in gpg Segmentation fault