Quote from: lenny_ on July 28, 2013, 08:50:41 AM

Quote from: mighq on July 28, 2013, 08:48:32 AM

hi,

I'm experiencing weird cm1 behavior and I'm running out of ideas. Sad

I was hashing fine with 800 Mhps using 200 MHz bitstream (makomk shortfin_dcmwd4e_ed_test_200_overclock.bit).
Then I've reinstalled my OS (xubuntu 13-> xubuntu 12.04) and now I can't get more than ~650 Mhps. Sad

When using bfgminer, which sees it as 2 devices ECM0+ECM1, it seems like first chip is only getting to ~250 Mhps and second one ~400. This is in the beginning, after some time both chips are stabilized at ~330 Mhps.
There are some HW errors and messages about increasing queue length in the beginning, then after lowering to 650 Mhps, it is fine.

I tried to change the miner to mpbm. Same result.
I tried to flash the bitstream to 180 Mhz one (makomk shortfin_dcmwd4e_ed_test_180.bit). No change.
I tried to use another OS: mpbm under win7. Didn't help.

It looks like one of chips is not doing well.

What can I do now to diagnose or fix the problem? Thanks for any ideas.

You using bfgminer. Please add

Code:

2>> cgminer.log

to you command line, so we can read your log.

here it is:
http://pastebin.com/i3nQaDMz

I expect avg hashrate to be around 720 (with 180 mhz bitstream), but it isn't. No hw errors shown in this 10m session, but hashrate went down from 720 in one moment to stable 640. If I let it run for 24h+ it avg will be only around 650.