I am still running my 5 instances of RG7Miner. I get the HW Error about the nonce that didn't produce a valid hash once in a while, that's clear now. But overnight had had two units fail with (almost) endless loop of HW Errors of this type. The strange thing is that after a while there was on single valid one again, then again lots of errors, then a single valid one again, etc...
Restarting the miner (Ctrl-C, up, enter) gets them going again. Happened a couple of times now. Possibly always on the same 2 Icarus units, but I am not sure yet it's not even been 24h (I have three instances running at 604 minutes now).
What happens if there are new blocks detected via LP or block monitor? Is there just no log output or is it currently not implemented?
[2012-02-29 10:51:45,311] [INFO] [rg7.rg7miner.SubmitMngr$Submitter][port=COM4]: LP, 521 valid, 1 invalid (0.19%), 7 stale (1.34%), 361.74 (+-15.74) mhash, runtime: 104.48 min, idle: 0.08%, last: valid (336 ms)
[2012-02-29 10:51:47,168] [INFO] [rg7.rg7miner.SubmitMngr$Submitter][port=COM4]: LP, 522 valid, 1 invalid (0.19%), 7 stale (1.34%), 362.37 (+-15.76) mhash, runtime: 104.50 min, idle: 0.08%, last: valid (335 ms)
[2012-02-29 10:51:55,116] [INFO] [rg7.rg7miner.SubmitMngr$Submitter][port=COM4]: LP, 523 valid, 1 invalid (0.19%), 7 stale (1.34%), 362.59 (+-15.75) mhash, runtime: 104.63 min, idle: 0.08%, last: valid (666 ms)
[2012-02-29 10:51:59,894] [INFO] [rg7.rg7miner.SubmitMngr$Submitter][port=COM4]: LP, 524 valid, 1 invalid (0.19%), 7 stale (1.34%), 362.98 (+-15.75) mhash, runtime: 104.72 min, idle: 0.08%, last: valid (336 ms)
[2012-02-29 10:52:12,402] [INFO] [rg7.rg7miner.SubmitMngr$Submitter][port=COM4]: LP, 525 valid, 1 invalid (0.19%), 7 stale (1.33%), 362.92 (+-15.73) mhash, runtime: 104.93 min, idle: 0.08%, last: valid (334 ms)
[2012-02-29 10:52:28,511] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 00301e54 doesn't produce a valid hash.
[2012-02-29 10:52:34,323] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 2500ff00 doesn't produce a valid hash.
[2012-02-29 10:52:48,306] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 93b87f00 doesn't produce a valid hash.
[2012-02-29 10:53:06,535] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 08c81300 doesn't produce a valid hash.
[2012-02-29 10:53:19,106] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 75008700 doesn't produce a valid hash.
[2012-02-29 10:53:45,807] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce ee461300 doesn't produce a valid hash.
[2012-02-29 10:54:03,581] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 4d008500 doesn't produce a valid hash.
[2012-02-29 10:54:20,150] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce c2fb4c00 doesn't produce a valid hash.
[2012-02-29 10:54:26,839] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce ed000000 doesn't produce a valid hash.
[2012-02-29 10:54:36,564] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 794e5400 doesn't produce a valid hash.
[2012-02-29 10:54:45,851] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 5c006400 doesn't produce a valid hash.
[2012-02-29 10:55:14,850] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 33203500 doesn't produce a valid hash.
[2012-02-29 10:55:23,064] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 5e204100 doesn't produce a valid hash.
[2012-02-29 10:55:39,994] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce da517000 doesn't produce a valid hash.
[2012-02-29 10:55:42,161] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 7df2fe00 doesn't produce a valid hash.
[2012-02-29 10:55:56,825] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce d18c3100 doesn't produce a valid hash.
[2012-02-29 10:56:20,509] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 6f179200 doesn't produce a valid hash.
[2012-02-29 10:56:32,809] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 87fb6c00 doesn't produce a valid hash.
[2012-02-29 10:56:32,894] [INFO] [rg7.rg7miner.SubmitMngr$Submitter][port=COM4]: LP, 526 valid, 19 invalid (3.56%), 7 stale (1.33%), 349.18 (+-15.12) mhash, runtime: 109.27 min, idle: 0.08%, last: valid (666 ms)
[2012-02-29 10:56:48,537] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 4f909d00 doesn't produce a valid hash.
[2012-02-29 10:56:59,217] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 0000a700 doesn't produce a valid hash.
[2012-02-29 10:57:07,135] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce f7002700 doesn't produce a valid hash.
[2012-02-29 10:57:09,428] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce beab6b00 doesn't produce a valid hash.
[2012-02-29 10:57:21,042] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 80a10500 doesn't produce a valid hash.
[2012-02-29 10:57:29,757] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce af94d500 doesn't produce a valid hash.
[2012-02-29 10:57:37,361] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 63f9f800 doesn't produce a valid hash.
[2012-02-29 10:58:00,753] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 6bcbf800 doesn't produce a valid hash.
[2012-02-29 10:58:18,696] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 79435e00 doesn't produce a valid hash.
[2012-02-29 10:58:31,269] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce b5b7e100 doesn't produce a valid hash.
[2012-02-29 10:59:44,969] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 55121f00 doesn't produce a valid hash.
[2012-02-29 10:59:56,393] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce ab608e00 doesn't produce a valid hash.
[2012-02-29 11:00:11,020] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 8b115300 doesn't produce a valid hash.
[2012-02-29 11:00:13,588] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce d6746700 doesn't produce a valid hash.
[2012-02-29 11:00:21,287] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 29d2a800 doesn't produce a valid hash.
[2012-02-29 11:01:09,988] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce fb828900 doesn't produce a valid hash.
[2012-02-29 11:01:32,822] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 59f35400 doesn't produce a valid hash.
[2012-02-29 11:01:42,483] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce a705cc00 doesn't produce a valid hash.
[2012-02-29 11:02:09,531] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 93be5300 doesn't produce a valid hash.
[2012-02-29 11:02:34,071] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 57000000 doesn't produce a valid hash.
[2012-02-29 11:03:22,741] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 1194fd00 doesn't produce a valid hash.
[2012-02-29 11:03:34,380] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 0098e500 doesn't produce a valid hash.
[2012-02-29 11:03:42,672] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce e80dd700 doesn't produce a valid hash.
[2012-02-29 11:03:46,024] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce d2aadb00 doesn't produce a valid hash.
[2012-02-29 11:04:29,601] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 5866bb00 doesn't produce a valid hash.
[2012-02-29 11:04:35,063] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 896a9500 doesn't produce a valid hash.
[2012-02-29 11:04:42,816] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 0ff37f00 doesn't produce a valid hash.
[2012-02-29 11:04:51,215] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 00b2a400 doesn't produce a valid hash.
[2012-02-29 11:04:57,180] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 00914600 doesn't produce a valid hash.
[2012-02-29 11:05:06,265] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce a0a53900 doesn't produce a valid hash.
[2012-02-29 11:05:25,736] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 7112d700 doesn't produce a valid hash.
[2012-02-29 11:05:28,585] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 8ff02000 doesn't produce a valid hash.
[2012-02-29 11:06:45,830] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce f0ea9100 doesn't produce a valid hash.
[2012-02-29 11:07:19,109] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 58dcab00 doesn't produce a valid hash.
[2012-02-29 11:07:33,559] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 2a9b7000 doesn't produce a valid hash.
[2012-02-29 11:07:35,352] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 9632c200 doesn't produce a valid hash.
[2012-02-29 11:07:47,467] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce d0430000 doesn't produce a valid hash.
[2012-02-29 11:07:56,367] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 79e6f400 doesn't produce a valid hash.
[2012-02-29 11:08:10,113] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 662ab000 doesn't produce a valid hash.
[2012-02-29 11:08:16,528] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 851e7200 doesn't produce a valid hash.
[2012-02-29 11:08:20,791] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 0fbcba00 doesn't produce a valid hash.
[2012-02-29 11:08:23,843] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce ac5a5500 doesn't produce a valid hash.
[2012-02-29 11:08:33,359] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce ecc92b00 doesn't produce a valid hash.
[2012-02-29 11:09:00,847] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce d18ab000 doesn't produce a valid hash.
[2012-02-29 11:09:18,212] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce b29a7900 doesn't produce a valid hash.
[2012-02-29 11:09:30,809] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 442a3500 doesn't produce a valid hash.
[2012-02-29 11:09:54,724] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 2b0b3f00 doesn't produce a valid hash.
[2012-02-29 11:09:55,423] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 0c0b2b00 doesn't produce a valid hash.
[2012-02-29 11:10:06,092] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 3e000e00 doesn't produce a valid hash.
[2012-02-29 11:10:57,902] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 4572e600 doesn't produce a valid hash.
[2012-02-29 11:11:32,845] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 7290d300 doesn't produce a valid hash.
[2012-02-29 11:11:41,968] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 9f833700 doesn't produce a valid hash.
[2012-02-29 11:11:51,049] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 00e91f00 doesn't produce a valid hash.
[2012-02-29 11:12:00,843] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce eac72800 doesn't produce a valid hash.
[2012-02-29 11:12:13,740] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 9ce40000 doesn't produce a valid hash.
[2012-02-29 11:12:25,707] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 006de200 doesn't produce a valid hash.
[2012-02-29 11:12:50,061] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 70c0f600 doesn't produce a valid hash.
[2012-02-29 11:12:57,754] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce ea001a00 doesn't produce a valid hash.
[2012-02-29 11:13:15,827] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 1b0feb00 doesn't produce a valid hash.
[2012-02-29 11:13:30,013] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce eb68ad00 doesn't produce a valid hash.
[2012-02-29 11:13:31,728] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 3b342000 doesn't produce a valid hash.
[2012-02-29 11:13:43,648] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 23203300 doesn't produce a valid hash.
[2012-02-29 11:14:05,010] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 8fee0000 doesn't produce a valid hash.
[2012-02-29 11:14:09,505] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce fb9f4400 doesn't produce a valid hash.
[2012-02-29 11:14:10,168] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce de41c400 doesn't produce a valid hash.
[2012-02-29 11:14:20,014] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 00355d00 doesn't produce a valid hash.
[2012-02-29 11:14:22,131] [ERROR] [rg7.rg7miner.fpga.FPGAControl][port=COM4]: HW error. Received nonce 6dae5300 doesn't produce a valid hash.