Forwarded post from rnpalmer: > That message does come from beignet-opencl-icd > (http://sources.debian.net/src/beignet/1.2.1-1/src/intel/intel_driver.c#L140), > and means that context creation failed, but doesn't specify why. > > To find out, please obtain a debug backtrace as follows: > > $ sudoedit /etc/apt/sources.list > [add the debug archive (deb > http://debug.mirrors.debian.org/debian-debug/ testing-debug main) if > not already present: https://wiki.debian.org/HowToGetABacktrace] > $ sudo apt-get update > $ sudo apt-get install gdb beignet-opencl-icd-dbgsym > libdrm-intel-dbgsym > $ gdb blender > (gdb) set pagination 0 > (gdb) break intel/intel_bufmgr_gem.c:3175 > [this will probably ask whether to make it pending on future library > load - answer yes] > (gdb) run > [trigger the crash - this will freeze, not close, the blender window] > (gdb) bt full > > What hardware are you using (lspci -nn | grep -e "\[03..\]:" )? > > Does the beignet test suite > (/usr/lib/x86_64-linux-gnu/beignet/utest_run from the beignet-dev > package) also crash/fail? > > Does the crash go away if you disable OpenCL in Blender's settings > (https://www.blender.org/manual/preferences/system.html#compute-device)? > > There are upstream bug reports that Blender's OpenCL doesn't work in > beignet, but they appear to be different problems.
I guess this could be related to LLVM bug #848368. Blender crashes because it uses different LLVM versions in the same process: mesa-opencl-icd uses LLVM 3.9 and beignet-opencl-icd probably uses LLVM 3.8. It has been reported that Blender also crashes if pocl (using LLVM 3.8) and mesa-opencl-icd are installed at the same time (https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=846162#5). See also bug #846410, kdevelop crashes if using two different LLVM versions in the same process. Thanks, Andreas
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