Print Page - bfgminer w/ opencl - Error -55: Enqueueing kernel onto command queue. (clEnq

I'm trying to understand mining and learn a bit about GPU/OpenCL processing. I've setup a simple test rig on Ubuntu 12.04 w/ an ATI Radeon HD 6350. I've installed AMD's drivers and SDK and 'clinfo' shows both GPU and CPU device types.

bfgminer shows:

Code:

$ bfgminer -S opencl:auto -n
 [2013-12-09 10:58:04] CL Platform 0 vendor: Advanced Micro Devices, Inc.                    
 [2013-12-09 10:58:04] CL Platform 0 name: AMD Accelerated Parallel Processing                    
 [2013-12-09 10:58:04] CL Platform 0 version: OpenCL 1.2 AMD-APP (1214.3)                    
 [2013-12-09 10:58:04] Platform 0 devices: 1                    
 [2013-12-09 10:58:04]  0       Cedar                    
 [2013-12-09 10:58:04] ADL Initialisation Error! Error -1!                    
 [2013-12-09 10:58:04] 1 GPU devices max detected

I can run bfgminer with the following results:

Code:

bfgminer -S opencl:auto --scrypt -o http://[::1]:9332 -u xxxx -p yyyy
...
 [2013-12-09 11:04:32] Error -55: Enqueueing kernel onto command queue. (clEnqueueNDRangeKernel)
 [2013-12-09 11:04:32] OCL 0 failure, attempting to reinitialize
 [2013-12-09 11:04:32] Error -55: Enqueueing kernel onto command queue. (clEnqueueNDRangeKernel)
 [2013-12-09 11:04:32] OCL 0 failure, disabling!
 [2013-12-09 11:04:32] OCL 0 being disabled
 [2013-12-09 11:04:38] Attempting to reinitialize OCL 0
 [2013-12-09 11:04:38] OCL 0 being re-enabled
 [2013-12-09 11:04:38] Error -55: Enqueueing kernel onto command queue. (clEnqueueNDRangeKernel)
 [2013-12-09 11:04:38] OCL 0 failure, disabling!
 [2013-12-09 11:04:38] OCL 0 being disabled

I've searched the web and forums but can't find a way to fix this. Anyone have any suggestions?

Thanks for any help!
S.

I had this problem aswell.
The error -55 translates to "CL_INVALID_WORK_ITEM_SIZE" , which basically means that the work size is too big.
You can reduce the worksize to 128 or 64 by appending "-w 128" to your command line :

Code:

bfgminer -S opencl:auto --scrypt -o http://[::1]:9332 -u xxxx -p yyyy [color=red]-w 128[/color]

This worked for me.

Happy mining and merry christmas!

Bitcoin Forum

Other => Beginners & Help => Topic started by: slefevre on December 09, 2013, 04:07:10 PM