strange, i can reproduce it with "-a blake", "-a blakecoin" beside "-a decred" (even with --benchmark)
blake2s, vanilla and other algos are fine
well, i'll stick with alexis78's ccminer for decred...
Are you waiting long enough for the cards to start? I've seen cards take up to 2 minutes before they report any hash.
no, didn't wait 2 minutes but even, with alexis78's miner all cards starts immediately...