Cross-posting an inquiry I sent yesterday to discuss-gnuradio; perhaps osmocom-sdr may be a more appropriate venue. ---------- Forwarded message ---------- From: "Card, Stu" stu.card@axenterprize.com Date: May 7, 2016 4:08 PM Subject: gr-fosphor: n00b run-time errors with benchmark tool and sink block on AMD APU To: discuss-gnuradio@gnu.org Cc:

My apologies for this n00b question, but I have not found answers in the

usual places.

I have carefully followed the instructions at

http://sdr.osmocom.org/trac/wiki/fosphor

For building the benchmark tool, I replaced the line

make LDFLAGS=-L/opt/intel/opencl-1.2-4.5.0.8/lib64

with

make LDFLAGS=-L/opt/AMDAPPSDK-3.0/lib/x86_64/sdk

for my AMD APU (CPU w/on-chip GPU) hardware

and

edited the Makefile to remove "-Werror" from the CFLAGS as otherwise the warning about cl_create_command_queue being deprecated causes Make to give up.

After thus building the benchmark tool, running main yields

libEGL warning: DRI2: failed to authenticate [+] Selected device: Devastator libGL error: No matching fbConfigs or visuals found libGL error: failed to load driver: swrast X Error of failed request: BadMatch (invalid parameter attributes) Major opcode of failed request: 157 (GLX) Minor opcode of failed request: 5 (X_GLXMakeCurrent) Serial number of failed request: 30 Current serial number in output stream: 30C

Attempting to use the GRC fosphor sink block in a trivial flowgraph (with a signal source, noise source and add operation, intended to give me a tone with a noise floor), I get no output until I manually terminate it, and then in the GRC message pane I see

libEGL warning: DRI2: failed to find _glapi_get_proc_address [+] Selected device: Devastator [!] CL Error (-34, /home/stu/gr-fosphor/lib/fosphor/cl.c:464): Unable to share waterfall texture into OpenCL context

The same flowgraph, with the fosphor sink replaced by a QT GUI waterfall sink, works as expected.

Any pointers would be greatly appreciated.

-- Stu Card stu.card@axenterprize.com