Ubuntu 17.04, RX 470 Strix 4GB, 4.11.0-kfd-compute-rocm-rel-1.6-148 kernel made no difference.
Sep 05 08:10:51 ethdcrminer64[1518]: LBC: Share accepted (144 ms)!
Sep 05 08:10:53 ethdcrminer64[1518]: LBC: 09/05/17-08:10:53 - New job from lbry.suprnova.cc:6256
Sep 05 08:10:58 ethdcrminer64[1518]: GPU0 t=67C fan=87%, GPU1 t=54C fan=87%, GPU2 t=59C fan=87%, GPU3 t=66C fan=87%, GPU4 t=65C fan=87%, GPU5 t=62C fan=87%
Sep 05 08:11:11 ethdcrminer64[1518]: LBC: 09/05/17-08:11:11 - SHARE FOUND - (GPU 3)
Sep 05 08:11:12 ethdcrminer64[1518]: LBC: Share accepted (143 ms)!
Sep 05 08:11:17 ethdcrminer64[1518]: LBC: 09/05/17-08:11:16 - SHARE FOUND - (GPU 0)
Sep 05 08:11:17 ethdcrminer64[1518]: LBC: Share accepted (143 ms)!
Sep 05 08:11:27 ethdcrminer64[1518]: GPU0 t=67C fan=87%, GPU1 t=54C fan=87%, GPU2 t=60C fan=87%, GPU3 t=66C fan=87%, GPU4 t=65C fan=87%, GPU5 t=62C fan=87%
Sep 05 08:11:30 ethdcrminer64[1518]: ETH: 09/05/17-08:11:30 - SHARE FOUND - (GPU 3)
Sep 05 08:11:30 ethdcrminer64[1518]: ETH: Share accepted (66 ms)!
Sep 05 08:11:39 ethdcrminer64[1518]: ETH: 09/05/17-08:11:38 - SHARE FOUND - (GPU 5)
Sep 05 08:11:39 ethdcrminer64[1518]: ETH: Share accepted (66 ms)!
Sep 05 08:11:44 ethdcrminer64[1518]: ETH: 09/05/17-08:11:43 - New job from us2.ubiqpool.io:8008
Sep 05 08:11:44 ethdcrminer64[1518]: ETH - Total Speed: 122.668 Mh/s, Total Shares: 6, Rejected: 0, Time: 00:04
Sep 05 08:11:44 ethdcrminer64[1518]: ETH: GPU0 22.521 Mh/s, GPU1 17.889 Mh/s, GPU2 20.122 Mh/s, GPU3 19.981 Mh/s, GPU4 21.968 Mh/s, GPU5 20.187 Mh/s
Sep 05 08:11:44 ethdcrminer64[1518]: LBC - Total Speed: 352.666 Mh/s, Total Shares: 17, Rejected: 0
Sep 05 08:11:44 ethdcrminer64[1518]: LBC: GPU0 64.748 Mh/s, GPU1 51.430 Mh/s, GPU2 57.850 Mh/s, GPU3 57.444 Mh/s, GPU4 63.156 Mh/s, GPU5 58.038 Mh/s
Sep 05 08:11:48 ethdcrminer64[1518]: LBC: 09/05/17-08:11:48 - New job from lbry.suprnova.cc:6256
Sep 05 08:11:49 ethdcrminer64[1518]: LBC: 09/05/17-08:11:49 - SHARE FOUND - (GPU 1)
Sep 05 08:11:49 ethdcrminer64[1518]: LBC: Share accepted (143 ms)!
Sep 05 08:11:52 ethdcrminer64[1518]: LBC: 09/05/17-08:11:52 - SHARE FOUND - (GPU 5)
Sep 05 08:11:52 ethdcrminer64[1518]: LBC: Share accepted (142 ms)!
Sep 05 08:11:58 ethdcrminer64[1518]: GPU0 t=67C fan=87%, GPU1 t=54C fan=87%, GPU2 t=60C fan=87%, GPU3 t=66C fan=87%, GPU4 t=66C fan=87%, GPU5 t=62C fan=87%
Sep 05 08:12:13 ethdcrminer64[1518]: LBC: 09/05/17-08:12:12 - SHARE FOUND - (GPU 4)
Sep 05 08:12:13 ethdcrminer64[1518]: LBC: Share accepted (144 ms)!
Sep 05 08:12:28 ethdcrminer64[1518]: GPU0 t=67C fan=87%, GPU1 t=54C fan=87%, GPU2 t=60C fan=87%, GPU3 t=67C fan=87%, GPU4 t=66C fan=87%, GPU5 t=62C fan=87%
Sep 05 08:12:37 ethdcrminer64[1518]: LBC: 09/05/17-08:12:37 - SHARE FOUND - (GPU 4)
Sep 05 08:12:37 ethdcrminer64[1518]: LBC: Share accepted (143 ms)!
Sep 05 08:12:43 ethdcrminer64[1518]: LBC: 09/05/17-08:12:43 - New job from lbry.suprnova.cc:6256
Sep 05 08:12:46 ethdcrminer64[1518]: LBC: 09/05/17-08:12:45 - SHARE FOUND - (GPU 5)
Sep 05 08:12:46 ethdcrminer64[1518]: LBC: Share accepted (144 ms)!
Sep 05 08:12:56 ethdcrminer64[1518]: ETH: 09/05/17-08:12:56 - SHARE FOUND - (GPU 2)
Sep 05 08:12:56 ethdcrminer64[1518]: ETH: Share accepted (66 ms)!