[Beignet] Beignet not working on Dell Precision M3800

[Yichao Yu]

Hi everyone,

(I'm not sure if this the right place to report bugs/issues but I have
searched through the internet and this is the only place I can find to
reach beignet developers..... Please feel free to tell me what is the
right place for bug report if it is not here.)

I have recently got a Dell Precision M3800 laptop which comes with a
Intel i7-4702HQ CPU and a NVIDIA Quadro K1100M GPU. I have no major
problems using the graphic cards with the opensource (for both cards)
or close source (for the NVIDIA card). However, when I want to use
OpenCL on the intel card with beignet it doesn't work.

The issue is, beignet can create OpenCL context without any problems
(and it also shows the correct device name...) but as long as I ask it
to calculate anything, it freezes the window manager (kwin 4.11.9 on
KDE 4.13 using OpenGL 2.0) for a few seconds and only the cursor is
moving. In addition, it sometimes (if not always) fails to run the
kernels and no result is returned.

Is this card supported or am I missing anything? It will be really
nice if I can get it working and I can provide any
information/collaboration in order to solve the problem if necessary.

Yichao Yu

System Info:
`lscpu`:
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                8
On-line CPU(s) list:   0-7
Thread(s) per core:    2
Core(s) per socket:    4
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 60
Model name:            Intel(R) Core(TM) i7-4702HQ CPU @ 2.20GHz
Stepping:              3
CPU MHz:               2428.250
CPU max MHz:           3200.0000
CPU min MHz:           800.0000
BogoMIPS:              4391.53
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              6144K
NUMA node0 CPU(s):     0-7

ArchLinux with [testing] enabled.
Linux kernel version: 3.14.4
mesa: 10.1.3 (and just upgraded to 10.2.0rc3)
beignet: current master (g31ff786, also tested with as many as 60
commits back and it was not working either)