I've had a working installation with OpenCL running and unfortunately executed dist-upgrade on my Ubuntu (because of the glibc bug). Then I recognized that OpenCL was not working anymore.I re-installed fglrx-core and tried to execute clinfo . Curiously, it runs endlessly with a CPU usage of 100%. Additionally, I cannot kill it with SIGKILL (kernel mode?).
Here is my system specification and some driver infos:
Kaveri [Radeon R7 Graphics] APU
Ubuntu 14.04 LTS (Linux ***** 3.13.0-77-generic #121-Ubuntu SMP Wed Jan 20 10:50:42 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux).