Beignet: self-test failed: (3, 7, 5) + (5, 7, 3) returned (6, 7, 5) on Linux 4.9.92 with a i7-8550U about beignet

[linnaea]

Bisecting points to commit f805337, blanking doNegAddOptimization method fixes the problem on my 4250U.

Try it if you're on a pre-Gen8 chip.

[bag-man]

@ruiling-song @xionghul @guoyejun @HeJunyan

This issue still persists. :(

[hellozee]

Same here, the issue pops up in the terminal when I start Nuke, so definitely not a resolve specific thing

CPU : i5-7200U 
Kernel : 4.19.6
Beignet : 1.3.2-5
Distro : Fedora 29

[ruiling]

@bag-man @hellozee I am sorry I didn't take care of this bug. right now, Beignet is not actively maintained anymore. I don't have any idea what's wrong behind the error message. One thing I can think of is to run the beignet unit tests see if you can get some hint from failure cases . And I strongly suggest you to try intel-compute-runtime at https://github.com/intel/compute-runtime which is used to replace Beignet.

[carolosf]

I have a similar issue:
Beignet: self-test failed: (3, 7, 5) + (5, 7, 3) returned (6, 1064921688, 5)

Ran the unit tests:

summary:

total: 1046
run: 1005
pass: 1005
fail: 0
pass rate: 1.000000

Intel(R) Core(TM) i7-4510U CPU @ 2.00GHz
beignet 1.3.2+12+gfc5f430c-1
Kernel: 4.19.8-2

[hellozee]

@ruiling nice, the failed tests message disappear once started using the compute-runtime, I can now use OpenCL in Blender Cycles

[YamashitaRen]

Commit f805337 seems to fix it.
However, I would like to point out that DaVinci Resolve core dumps when using any of Intel's OpenCL drivers. Please notice that incompatible OpenCL drivers should be uninstalled as they may cause Resolve to crash (e.g. uninstall opencl-mesa if you're using a proprietary equivalent).
https://wiki.archlinux.org/index.php/DaVinci_Resolve