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M@H v1.02(opencl_amd_ati) errors: "error while computing"

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Robert Meckley

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Message 62403 - Posted: 25 Sep 2014, 14:25:17 UTC

This past week I have noticed that many of my M@H v1.02(opencl_amd_ati) tasks have run and ended with the status "error while computing". Specifically the WUs are labeled "ps_84_DR8_rev_8_4_00001_141150441_ ". I suppose all of us have been getting a lot of errors lately if we have tried to run ModifiedFit v.1.32 due to the bugs in the recent revisions. But there have been no recent revisions to the M@H (opencl_amd_ati)application, at least none of which I'm aware. To clarify my concern, most of these WUs are completing without incident. Presently I am showing 2950 valid and 56 errors in recent completions. Perhaps this is normal, but I have never, in the past, noticed an error count of more than 1 or 2 in any application that I've run with M@H, that is until the recent revisions to ModifiedFit. (Currently I've opted out of running ModifiedFit.) Moreover, when I click on the details of these WUs, I see that other computers seem to run these WUs without a problem. I've searched this form for threads discussing M@H(opencl) errors, but these discussions tend to driver problems or legacy GPU problems. I'm using an HD7970 with driver 1.4.1848 OpenCL:1.2 as many others are, so I don't think I have a driver or hardware issue. I have recently changed from using an intel quad to an AMD quad CPU, and also changed OS from Windows7 to Ubuntu 14.04, but I've made such changes in the past and have not noticed an advanced error count. Anyway, I can not see how these changes could impact the functioning of my GPU. If anyone can make sense of this, I would be very grateful. In fact, If you can assure me that this is not a problem, that's O.K. too - I just want to understand what's going on.

(Do we ever really understand what's going on?!)
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Message 62472 - Posted: 5 Oct 2014, 12:01:54 UTC - in response to Message 62403.  

Did you switch to a newer graphics driver with the new build?
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Robert Meckley

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Message 62477 - Posted: 5 Oct 2014, 12:57:58 UTC - in response to Message 62472.  

Did you switch to a newer graphics driver with the new build?


Yes, of course. The Catalyst proprietary driver in the Ubuntu 14.04 repository was the same one that I had been using with Windows. The research I did after posting this problem suggested that the problem might actually be with Ubuntu 14.04. I found that two other users using the Linux kernel image of Ubuntu 14.04 and catalyst driver identified by BOINC as 1.4.1848 had the same problem. I will never be certain that there is some incompatibility between Ubuntu 14.04 and the M@H application, but in any event, I went back to running windows 7 and am now running the M@H application without any problem. I thank you very kindly for taking an interest in my post.
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