[Pkg-opencl-devel] Bug#860805: beignet-opencl-icd: OpenCL fails with: drm_intel_gem_bo_context_exec() failed: Device or resource busy

[Rebecca N. Palmer]

Control: severity -1 serious

I have been working on this upstream:
https://bugs.freedesktop.org/show_bug.cgi?id=100639

It appears to totally break beignet on Ivybridge/Haswell on recent 
(including sid/stretch) Linux.  (I didn't notice it before because I 
test in a chroot, i.e. with jessie's too-old-to-be-affected Linux.)

It's not yet entirely clear what to do about it:

The above patch works for me, but apparently not for everyone.

The other known partial fix is to disable softpin, but that also isn't a 
complete fix, and also disables OpenCL 2.0.