AMD APU Kabini - OpenCL
Matthew Harrington 
What’s the best combination of Ubuntu and AMD software in order to have Kabini APU/GPU running with OpenCL?
I’ve tried 16.04.x, 14.04.5, open source and AMD’s closed drivers. Nothing works.
This is what I have:
root@apucomputer2:~# dmidecode | grep AMD
Manufacturer: AuthenticAMD
Version: AMD Sempron™ 3850 APU with Radeon™ R3
root@apucomputer2:~#
root@apucomputer2:~# lspci | grep VGA
00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Kabini [Radeon HD >8280 / R3 Series]
root@apucomputer2:~#
root@apucomputer2:~#
root@apucomputer2:~# uname -a
Linux apucomputer2.nuo.com.mx 4.4.0-62-generic #83-Ubuntu SMP Wed Jan 18 14:10:15 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
root@apucomputer2:~#
root@apucomputer2:~# cat /etc/issue
Ubuntu 16.04.3 LTS \n \l2 Answers
Finally it worked on Ubuntu 14.04.2. It has to be the exact patch level ...2. Amazing.
$ cat /etc/issue
Ubuntu 14.04.2 LTS \n \lOpenCL working:
Number of platforms: 1 Platform Profile: FULL_PROFILE Platform Version: OpenCL 2.0 AMD-APP (1912.5) Platform Name: AMD Accelerated Parallel Processing Platform Vendor: Advanced Micro Devices, Inc. Platform Extensions: cl_khr_icd cl_amd_event_callback cl_amd_offline_devices Platform Name: AMD Accelerated Parallel Processing
Number of devices: 2 Device Type: CL_DEVICE_TYPE_GPU Vendor ID: 1002h Board name: Device Topology: PCI[ B#0, D#1, F#0 ] Max compute units: 2 Max work items dimensions: 3 Max work items[0]: 256 Max work items[1]: 256 Max work items[2]: 256 Max work group size: 256 Preferred vector width char: 4 Preferred vector width short: 2 Preferred vector width int: 1 Preferred vector width long: 1 Preferred vector width float: 1 Preferred vector width double: 1 Native vector width char: 4 Native vector width short: 2 Native vector width int: 1 Native vector width long: 1 Native vector width float: 1 Native vector width double: 1 Max clock frequency: 450Mhz Address bits: 64 Max memory allocation: 194992128 Image support: Yes Max number of images read arguments: 128 Max number of images write arguments: 64 Max image 2D width: 16384 Max image 2D height: 16384 Max image 3D width: 2048 Max image 3D height: 2048 Max image 3D depth: 2048 Max samplers within kernel: 16 Max size of kernel argument: 1024 Alignment (bits) of base address: 2048 Minimum alignment (bytes) for any datatype: 128 Single precision floating point capability Denorms: No Quiet NaNs: Yes Round to nearest even: Yes Round to zero: Yes Round to +ve and infinity: Yes IEEE754-2008 fused multiply-add: Yes Cache type: Read/Write Cache line size: 64 Cache size: 16384 Global memory size: 779968512 Constant buffer size: 65536 Max number of constant args: 8 Local memory type: Scratchpad Local memory size: 32768 Max pipe arguments: 16 Max pipe active reservations: 16 Max pipe packet size: 194992128 Max global variable size: 175492864 Max global variable preferred total size: 779968512 Max read/write image args: 64 Max on device events: 1024 Queue on device max size: 8388608 Max on device queues: 1 Queue on device preferred size: 262144 SVM capabilities: Coarse grain buffer: Yes Fine grain buffer: Yes Fine grain system: No Atomics: No Preferred platform atomic alignment: 0 Preferred global atomic alignment: 0 Preferred local atomic alignment: 0 Kernel Preferred work group size multiple: 64 Error correction support: 0 Unified memory for Host and Device: 1 Profiling timer resolution: 1 Device endianess: Little Available: Yes Compiler available: Yes Execution capabilities: Execute OpenCL kernels: Yes Execute native function: No Queue on Host properties: Out-of-Order: No Profiling : Yes Queue on Device properties: Out-of-Order: Yes Profiling : Yes Platform ID: 0x7fd39b7aca18 Name: Kalindi Vendor: Advanced Micro Devices, Inc. Device OpenCL C version: OpenCL C 2.0 Driver version: 1912.5 (VM) Profile: FULL_PROFILE Version: OpenCL 2.0 AMD-APP (1912.5) Extensions: cl_khr_fp64 cl_amd_fp64 cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_int64_base_atomics cl_khr_int64_extended_atomics cl_khr_3d_image_writes cl_khr_byte_addressable_store cl_khr_gl_sharing cl_khr_gl_depth_images cl_ext_atomic_counters_32 cl_amd_device_attribute_query cl_amd_vec3 cl_amd_printf cl_amd_media_ops cl_amd_media_ops2 cl_amd_popcnt cl_khr_image2d_from_buffer cl_khr_spir cl_khr_subgroups cl_khr_gl_event cl_khr_depth_images cl_khr_mipmap_image cl_khr_mipmap_image_writes I'm actually using Fedora, but have spent far more time on this than my little A4-5000 is worth =)
The conclusion I reached is that the AMDGPU driver should have limited support for Kabini, but needs the IOMMU enabled. If your BIOS doesn't support IOMMU, you are out of luck.
Of course I would love to hear a happier story from someone who is better informed.
