Comment 0 for bug 1354086

pyopencl is partly or wholly unusable on an Intel i5-3230 integrated GPU:

beignet 0.3 (trusty default):
pyopencl.elementwise.ElementwiseKernel draws dotted stripes across the screen, and gives wrong results
pyopencl.clmath segfaults Python

beignet 0.8 (utopic source, recompiled in trusty):
pyopencl.elementwise.ElementwiseKernel works
pyopencl.clmath hangs the entire system (screen frozen, any playing sounds repeating in ~0.5sec loop, requires Alt+SysRq+b reboot; System Monitor shows no abnormal memory usage before the hang, but I don't know if it counts GPU memory)

To reproduce: python pocl_test.py

I'm guessing this is a beignet rather than pyopencl bug, as pyopencl worked on my previous (nvidia) system and a normal application shouldn't be able to hang the whole system.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: beignet (not installed)
ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Aug 7 17:18:35 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-08-01 (6 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64+mac (20140722.2)
SourcePackage: beignet
UpgradeStatus: No upgrade log present (probably fresh install)