Bug 101332 - 'error, unknown device: 1927' on i5-6267U (Skylake), INTEL_DEVID_OVERRIDE won't help much
Summary: 'error, unknown device: 1927' on i5-6267U (Skylake), INTEL_DEVID_OVERRIDE won...
Alias: None
Product: Beignet
Classification: Unclassified
Component: Beignet (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) All
: medium major
Assignee: Xiuli Pan
QA Contact:
Depends on:
Reported: 2017-06-07 18:32 UTC by Jacek Konieczny
Modified: 2018-10-12 21:25 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

utest_run output for INTEL_DEVID_OVERRIDE=0x1906 (200.39 KB, text/x-log)
2017-06-07 18:32 UTC, Jacek Konieczny
utest_run output after the patch applied (42.60 KB, text/plain)
2017-06-14 15:36 UTC, Jacek Konieczny

Description Jacek Konieczny 2017-06-07 18:32:26 UTC
Created attachment 131786 [details]
utest_run output for INTEL_DEVID_OVERRIDE=0x1906

Beignet: 1.3.1
Kernel: 4.9.6-1
Acer Aspire E 15 laptop
CPU: Intel(R) Core(TM) i5-6267U CPU @ 2.90GHz
GPU: VGA compatible controller [0300]: Intel Corporation Iris Graphics 550 [8086:1927] (rev 0a)
Mesa works properly on this system (both OpenGL and Vulkan)

clinfo fails:
$ ./clinfo 
cl_get_gt_device(): error, unknown device: 1927
cl_get_gt_device(): error, unknown device: 1927
Platform #0
  Name:                                  Intel(R) OpenCL
  Version:                               OpenCL 2.0 LINUX

  Device #0
    Name:                                Intel(R) Core(TM) i5-6267U CPU @ 2.90GHz
    Type:                                CPU
    Version:                             OpenCL 2.0 (Build 400)
    Global memory size:                  7 GB 756 MB 708 kB 
    Local memory size:                   32 kB 
    Max work group size:                 8192
    Max work item sizes:                 (8192, 8192, 8192)

Platform #1
  Name:                                  Intel Gen OCL Driver
  Version:                               OpenCL 2.0 beignet 1.3

cl_get_gt_device(): error, unknown device: 1927
./clinfo: Cannot get the number of OpenCL devices available on this platform.

I tried $INTEL_DEVID_OVERRIDE (with different values) with no luck:

$ INTEL_DEVID_OVERRIDE=0x1906 ./clinfo 
Beignet: self-test failed: (3, 7, 5) + (5, 7, 3) returned (3, 7, 5)
See README.md or http://www.freedesktop.org/wiki/Software/Beignet/
Beignet: disabling non-working device
Beignet: disabling non-working device


$ ./utest_run 
platform number 1
platform_profile "FULL_PROFILE"
platform_name "Intel Gen OCL Driver"
platform_vendor "Intel"
platform_version "OpenCL 2.0 beignet 1.3"
platform_extensions "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_byte_addressable_store cl_khr_3d_image_writes cl_khr_image2d_from_buffer cl_khr_depth_images cl_khr_spir cl_khr_icd cl_intel_accelerator cl_intel_subgroups cl_intel_subgroups_short cl_khr_gl_sharing"
cl_get_gt_device(): error, unknown device: 1927
error calling clGetDeviceIDs
Failed to initialize cl device.

  total: 1000
  run: 0
  pass: 0
  fail: 0
  pass rate: 0.000000

$ INTEL_DEVID_OVERRIDE=0x1906 ./utest_run
[...full log attached...]
  total: 1000
  run: 959
  pass: 51
  fail: 908
  pass rate: 0.053180

The same Beignet binaries work on another Skylake system (i5-6400)
Comment 1 Xiuli Pan 2017-06-14 02:33:19 UTC
Hi Jacek,

It seems we did not update the supported PCIID as there are some new skylake device. I will send a patch to update these PCIIDs. We do not have devices with ALL of the PCIIDs,so could you have a try with utest to see if the patch works fine?

Comment 2 Xiuli Pan 2017-06-14 03:44:03 UTC
The patch is here, could you try it and give me some feedback.


Comment 3 Jacek Konieczny 2017-06-14 15:36:20 UTC
Created attachment 131955 [details]
utest_run output after the patch applied
Comment 4 Jacek Konieczny 2017-06-14 15:37:02 UTC
Much better now:

compiler_fill_gl_image()    [FAILED]
    Error: error calling clBuildProgram with error CL_BUILD_PROGRAM_FAILURE 

  at file [...]/utests/utest_helper.cpp, function cl_kernel_init, line 269

  total: 1000
  run: 959
  pass: 958
  fail: 1
  pass rate: 0.998957
Comment 5 Xiuli Pan 2017-06-15 02:39:16 UTC
What the LLVM version you are using? That's a known issue with LLVM 3.8+ and it has been fixed by 


Comment 6 Jacek Konieczny 2017-06-15 09:35:58 UTC
I use LLVM 39.1 and the patch fixed the last test for me.

Thank you, Xiuli. 

Comment 7 Xiuli Pan 2017-06-16 03:01:23 UTC
OK, I will close this bug report after my patch is merged in.
And you can try our master branch then.

Comment 8 GitLab Migration User 2018-10-12 21:25:05 UTC
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