After a Restart Today, Completely Unable to run more than 1 vega 56

[Sayyiditow]

I have been using 6 vega 56 with asus b250 mining with rocm perfectly for the last two days. I had to restart ubuntu for updates and after that, although rocm recognizes the cards, they dont hash. The only card that hashes is the one on the pcie3.0 slot. I am out of ideas, I have reinstalled ubuntu 10 times nothing, still only one out of 6 cards mine. I am unsure what else to do. Please help. I have even tried with 2 cards only, and only 1 hashes.

Stats GPU 0 - lyra2z: 5.628Mh/s (5.609Mh/s)
[2018-06-06 03:54:09] Stats GPU 1 -
[2018-06-06 03:54:09] Stats Total - lyra2z: 5.628Mh/s (5.609Mh/s)

GPU 0 is always the only card hashing. 0 is on the pcie3.0 slot.

I followed these instructions as usual - which worked perfectly the last two days: https://github.com/RadeonOpenCompute/ROCm

./rocm-smi shows:
==================== ROCm System Management Interface ====================

GPU Temp AvgPwr SCLK MCLK Fan Perf SCLK OD
1 N/A N/A N/A N/A 0% N/A N/A
2 35.0c 15.0W 1474Mhz 800Mhz 70.98% manual 0%
0 59.0c 150.0W 1312Mhz 800Mhz 70.98% manual 0%

==================== End of ROCm SMI Log ====================

As you can see only gpu 0 is working.

Any help is appreciated.

Thank you!

[issie81]

i am having more or less same issue, i use ROCM the cards are seen in linux even miner detects yet it only hashes with 1 card, also using Vega 56.. Software for Vegas seems to be abit weak:(

[Sayyiditow]

But this just started today, it was working perfectly, 6 vegas for 2 days continuous.

[issie81]

that is really strange so i would blame this on the os? (since after update it didnt work).. i assume you mine with Tdxminer, do you mine with Rocm 1.7.1 or the new 1.8.1?
this has to have an easy fix..

[Sayyiditow]

tdxminer, rocm 1.8.151. Yes same here, it must have been the system update. Not sure when we can get a fix :(

[gstoner]

Your issue is in 1.8.1, we found a bug with SDMA firmware had to turn back on PCIe Atomics, they are working on a fix for it in the SDMA firmware. But we needed to address an issue with REHL/CENTOS 7.5 support to simplify

You need to disable the SDMA which go back to PCIe atomic free mode to do this you must set HSA_ENABLE_SDMA=0

[Sayyiditow]

Hi @gstoner how do we set that? Sorry not so good with ubuntu. Thanks so much.

[Sayyiditow]

Ah it is done on the terminal. Nevermind. Trying it now.

[Sayyiditow]

I can confirm that HSA_ENABLE_SDMA=0 works perfectly. I have set it up on the "startup applications" All gpus hashing. Thanks @gstoner !

[gstoner]

You use
export HSA_ENABLE_SDMA=0

I also cleaned up the language on the Readme.

One thing you can look at is all the debug flags for ROCm here
http://rocm-documentation.readthedocs.io/en/latest/Other_Solutions/Other-Solutions.html

[Sayyiditow]

Thank you!