making my GPU usable for OpenCL

[Geremia]

I get this error with BFGMiner:

bfgminer -n
 [2013-04-06 20:11:28] Failed to load OpenCL library, no GPUs usable                   
 [2013-04-06 20:11:28] 0 GPU devices max detected

Here's my "bfgminer -D -d?":

Code:

 [2013-04-25 09:47:31] ft232r_scan: Found 093a:2510 - not a ft232r                    
 [2013-04-25 09:47:31] ft232r_scan: Found 1d6b:0002 - not a ft232r                    
 [2013-04-25 09:47:31] ft232r_scan: Found 1d6b:0002 - not a ft232r                    
 [2013-04-25 09:47:31] ft232r_scan: Found 8087:0020 - not a ft232r                    
 [2013-04-25 09:47:31] ft232r_scan: Found 8087:0020 - not a ft232r                    
 [2013-04-25 09:47:31] Started bfgminer 3.0.1                    
 [2013-04-25 09:47:31] Loaded configuration file /home/geremia/.bfgminer/bfgminer.conf                    
 [2013-04-25 09:47:31] CL Platform 0 vendor: Intel(R) Corporation                    
 [2013-04-25 09:47:31] CL Platform 0 name: Intel(R) OpenCL                    
 [2013-04-25 09:47:31] CL Platform 0 version: OpenCL 1.1 LINUX                    
 [2013-04-25 09:47:31] Error -1: Getting Device IDs (num)                    
**[2013-04-25 09:47:31] clDevicesNum returned error, no GPUs usable**
 [2013-04-25 09:47:31] Not a ZTEX device 093a:2510                    
 [2013-04-25 09:47:31] Not a ZTEX device 1d6b:0002                    
 [2013-04-25 09:47:31] Not a ZTEX device 1d6b:0002                    
 [2013-04-25 09:47:31] Not a ZTEX device 8087:0020                    
 [2013-04-25 09:47:31] Not a ZTEX device 8087:0020                    
 [2013-04-25 09:47:31] Devices detected:                    
 [2013-04-25 09:47:31]   0. CPU 0  (driver: cpu)                    
 [2013-04-25 09:47:31]   1. CPU 1  (driver: cpu)                    
 [2013-04-25 09:47:31]   2. CPU 2  (driver: cpu)                    
 [2013-04-25 09:47:31]   3. CPU 3  (driver: cpu)                    
4 devices listed

And my "lspci -nn | grep VGA":

Code:

00:02.0 VGA compatible controller [0300]: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 18)

How do I make my GPU usable? Since it's powering my video, would this require going headless? And how would I go headless?

thanks

[Bonam]

Er... it sounds like you don't have a GPU, just integrated graphics on your CPU. Is that correct, or do you have an actual dedicated GPU and it's not being detected? If so, what card is it?

[Geremia]

Er... it sounds like you don't have a GPU, just integrated graphics on your CPU.

Which, nevertheless, my computer calls a GPU…

Is that correct, or do you have an actual dedicated GPU and it's not being detected? If so, what card is it?

No, I don't have a graphics card dedicated solely to mining. Is it not possible to run headless on the integrated GPU? thanks

[Gabi]

Your GPU does not support OpenCL

You can't mine

Get a GPU wich support OpenCL (any dedicated one or the one in the recent processors) to mine

[KNK]

On your machine you may either mine with your CPU or the to search for 'Intel Open CL' - they have provided some Open CL support recently, but i don't know any details, as i have not tested it yet myself.

P.S.
In both cases (CPU or Intel GPU mining) you will be at very low hashrate and huge power usage, so it will not be profitable, but still you may test it to get some hands on mining.

P.P.S.
 If it is a laptop i do not recommend mining at all or you may damage it pretty quickly

[Geremia]

On your machine you may either mine with your CPU or the to search for 'Intel Open CL' - they have provided some Open CL support recently, but i don't know any details, as i have not tested it yet myself.

Yes, I have OpenCL installed and working, but I apparently can't use it with my GPU because it's in use.

P.S.
In both cases (CPU or Intel GPU mining) you will be at very low hashrate and huge power usage, so it will not be profitable, but still you may test it to get some hands on mining.

Yes, I just want to test things and get used to the software. I don't expect to make anything off it (perhaps a tiny amount with Litecoin, though).

P.P.S.
 If it is a laptop i do not recommend mining at all or you may damage it pretty quickly

Indeed

[Geremia]

Your GPU does not support OpenCL

How do you know that? Couldn't the output saying it's unusable mean it's just being occupied?

[KNK]

Yes, I have OpenCL installed and working, but I apparently can't use it with my GPU because it's in use.

This is not a reason not to be able to mine with it and in fact it is the opposite ... as i can see you are on Linux - you need to use it and have X running on it, then you may need to 'export DISPLAY=:0' before you run your miner in order to detect the GPU

With ATI SDK there clinfo tool which should detect the GPU if it has OpenCL support on my machine i have:

$ clinfo | grep GPU
  Device Type:                                   CL_DEVICE_TYPE_GPU

[Geremia]

Yes, I have OpenCL installed and working, but I apparently can't use it with my GPU because it's in use.

This is not a reason not to be able to mine with it and in fact it is the opposite ... as i can see you are on Linux - you need to use it and have X running on it, then you may need to 'export DISPLAY=:0' before you run your miner in order to detect the GPU

With ATI SDK there clinfo tool which should detect the GPU if it has OpenCL support on my machine i have:

$ clinfo | grep GPU
  Device Type:                                   CL_DEVICE_TYPE_GPU

Thanks for the help, but setting DISPLAY didn't help; I still get the "Failed to load OpenCL library, no GPUs usable" error…

[KNK]

"Failed to load OpenCL library" - may that be the problem?

Is it in your default library path or somewhere else? You may need to list that location in ld.so.conf and do ldconfig.

You may also need to recompile the miner with your version of the lib, because currently it looks for a different lib than yours

[KNK]

Found this thread - https://bitcointalk.org/index.php?topic=25270.0 so it seems OpenCL from Intel is not for the GPU, but CPU only.

Use --enable-cpumining to get some hands on mining, but make sure not to ovreheat your laptop

[Geremia]

Found this thread - https://bitcointalk.org/index.php?topic=25270.0 so it seems OpenCL from Intel is not for the GPU, but CPU only.

That could be.

[Geremia]

"Failed to load OpenCL library" - may that be the problem?

Is it in your default library path or somewhere else? You may need to list that location in ld.so.conf and do ldconfig.

You may also need to recompile the miner with your version of the lib, because currently it looks for a different lib than yours

Strange that running ldd on bfgminer doesn't yield any OpenCL libraries:

Code:

        linux-vdso.so.1 (0x00007fffbb9ff000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00007fd99b0d3000)
        libcurl.so.4 => /usr/lib64/libcurl.so.4 (0x00007fd99ae79000)
        libjansson.so.4 => /usr/lib64/libjansson.so.4 (0x00007fd99ac6d000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fd99aa50000)
        libncursesw.so.5 => /lib64/libncursesw.so.5 (0x00007fd99a7f2000)
        libudev.so.0 => /lib64/libudev.so.0 (0x00007fd99a5e5000)
        libusb-1.0.so.0 => /usr/lib64/libusb-1.0.so.0 (0x00007fd99a3d6000)
        libm.so.6 => /lib64/libm.so.6 (0x00007fd99a0d3000)
        libblkmaker_jansson-0.1.so.0 => /lib/libblkmaker_jansson-0.1.so.0 (0x00007fd999ed0000)
        libblkmaker-0.1.so.0 => /lib/libblkmaker-0.1.so.0 (0x00007fd999ccd000)
        libc.so.6 => /lib64/libc.so.6 (0x00007fd999903000)
        /lib64/ld-linux-x86-64.so.2 (0x00007fd99b318000)
        libidn.so.11 => /usr/lib64/libidn.so.11 (0x00007fd9996d1000)
        libssl.so.1 => /usr/lib64/libssl.so.1 (0x00007fd999467000)
        libcrypto.so.1 => /usr/lib64/libcrypto.so.1 (0x00007fd99908a000)
        liblber-2.4.so.2 => /usr/lib64/liblber-2.4.so.2 (0x00007fd998e7c000)
        libldap-2.4.so.2 => /usr/lib64/libldap-2.4.so.2 (0x00007fd998c34000)
        libz.so.1 => /usr/lib64/libz.so.1 (0x00007fd998a1e000)
        librt.so.1 => /lib64/librt.so.1 (0x00007fd998816000)
        libresolv.so.2 => /lib64/libresolv.so.2 (0x00007fd9985fb000)
        libsasl2.so.2 => /usr/lib64/libsasl2.so.2 (0x00007fd9983e1000)

BFGMiner's ./configure did detect OpenCL, however, so I thought I built it correctly…

[KNK]

If you have BFGminer compiled with CPU support you still need to enable it when starting the miner. Also you may simply use a cpuminer (like from the thread about OpenCL)

[drgonzo]

Your GPU is integrated and does not support OpenCL. Get a Radeon card if you want to do mining.

[eightythree]

ATI > nVidia

[drgonzo]

ATI > nVidia

NVidia, apart from their strongest GPUs are totally useless for mining. And even they perform very poorly in comparison to the same-level AMD/ATI cards.

[KNK]

It's a laptop without GPU, so adding one will be ... a bit impossible

[drgonzo]

It's a laptop without GPU, so adding one will be ... a bit impossible

Your only option is CPU mining, then, and CPU mining is pointless. You could get up about 30MH/s on a high-end i7, and it will make the temperatures run very hot. Especially on a laptop.