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Date: Wed, 13 Feb 2013 09:58:52 +0530
From: Sayantan Datta <std2048@...il.com>
To: john-dev@...ts.openwall.com
Subject: Re: Do you have this hardware and a few minutes?

On Wed, Feb 13, 2013 at 3:40 AM, magnum <john.magnum@...hmail.com> wrote:

> On 9 Feb, 2013, at 5:51 , Sayantan Datta <std2048@...il.com> wrote:
>
> I've my 4890 lying around but I'm unable to use it alongside 7970. Even
> though I have configured my driver to detect both the cards , but AMD
> OpenCL won't recognize them simultaneously.  I posted this issue on amd
> forums but I didn't get a complete solution.
> http://devgurus.amd.com/message/1284901#1284901
>
>
> I helped someone set up a machine with two cards for GPGPU, running Linux.
> There was no chance of getting the second GPU to work (the one without a
> physical monitor attached) until we made a loopback plug, fooling it into
> thinking there is a monitor. Maybe this has something to do with it?
>
> http://www.overclock.net/t/384733/the-30-second-dummy-plug
>
> After that, it was just "aticonfig --adapter=all --initial" and everything
> worked fine.
>
> magnum
>

That is really cool hack. I did "aticonfig --adapter=all --initial" and my
driver detects both the card ,but opencl won't. Clinfo only shows the 7970
and cpu.

sayantan@...n:/usr/bin$ aticonfig --adapter=1 --odgc

Adapter 1 - ATI Radeon HD 4800 Series

                                Core (MHz)    Memory (MHz)

          Current Clocks :    240           975

             Current Peak :    850           975

  Configurable Peak Range : [500-1000]     [975-1200]

                 GPU load :    0%



sayantan@...n:/usr/bin$ aticonfig --adapter=0 --odgc

Adapter 0 - AMD Radeon HD 7900 Series

                            Core (MHz)    Memory (MHz)

           Current Clocks :    300           150

             Current Peak :    925           1375

  Configurable Peak Range : [300-1125]     [150-1575]
                 GPU load :    0%

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