how to use --platform flag for poclbm

[TheShoura]

Wrong platform or more than one OpenCL platforms found, use --platform to select
one of the following

• NVIDIA CUDA
[1] AMD Accelerated Parallel Processing

I'm told to fix this I need to add a --platform tag to my startup command and nobody replied to another thread after asking the question so I'm hoping to get my miner back up and running ASAP. Its been a couple of hours already

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[SmokeTooMuch]

afaik the flag is called "-d" for device.
-d 0 for the first device, -d 1 for the second and so on.

[TheShoura]

got it, thanks

[Garrett Burgwardt]

--platform and -d are different commands completely.

-d tells the miner what hardware to use, and --platform tells it what software to use.

[m0mchil]

This means you have both Nvidia and AMD drivers. Just add --platform=0 or --platform=1 to choose one of them.

[ahu]

Hi.

I have Nvidia cards in addition to an ATI 5970 as well. I'm having problems getting the second core to mine. I'm using the option "New OpenCL miner" and selecting rpcminer-opencl.exe. I've used flags -platform 1 and tried -gpu and -d flags, but the software allways only loads one ATI core according to GPU-Z. If I run two instances with different -gpu or -d flags, the per client client hash rate gets halved.

Only Catalyst driver 11.3 works for me, the other ones I've tried give me OpenCL errors. Can anyone give me some advice on which driver versions and flag settings that work?

[sniper_sniperson]

It's known bug for disabled 2nd core of 5970. Just remove nvidia, or play on another machine.

[ahu]

Thanks, but I found a solution by using Diablo miner. Diablo seems to use a flat OpenCL device enumeration, without a platform flag. In my case the 5970 cores are devices 5 and 6, whereas devices 1 to 4 are the cores of my two Nvidia GTX 590 cards. Combined hash rate is around 1 GHash/s.

And I can play with Quad SLI with the same system. Perfect 

The only minor problem I have is that I have to disable the ATI devices in Control Panel in order to use PhysX. But I guess this can be done by a script as well.