[Beignet] few questions on Beignet-OpenCL-ICD v1.2.0 regarding X11 and kernel patches

[Rebecca N. Palmer]

I just built beignet in a chroot with no X11 installed; it didn't have 
that string, and worked (when run as root - for ordinary users, it 
failed with "/dev/dri/card0 not authenticated", but this is expected).

Debian's (with-X) beignet has that string and a few more (__cxx11, 
x11_display, x11_screen, x11_dpy).

Did you do the no-X compile by an explicit option, or by not installing 
the X headers (libx11-dev, libxext-dev, libxfixes-dev)?

Which clinfo is this (there are at least 3 implementations), and can you 
get a backtrace of the error (gdb clinfo)?

beignet doesn't need any kernel patches on recent kernels (>=4.2; check 
with uname -r), and in the known cases where it does, the error is 
"Beignet: self-test failed" not yours.