And Rebecca N. Palmer writes:
What hardware (lspci -nn | grep -e "\[03..\]:"),
Skylake laptop, so "Intel Corporation HD Graphics 520 [8086:1916]". Most recent versions, etc.
Try removing xserver-xorg-video-intel: it isn't needed on anything recent enough to use beignet, and has been known to break things.
That did it, thank you! Perhaps beignet-opencl-icd should conflict with that package.
That Linux version is not in Debian - did you compile it yourself?
Yes, automatic transparent hugepages are a major win for my workloads.

