So, I did a quick "audit" this evening of four different machines in my
house, running both Ubuntu recent and Fedora recent, but with
different generations of video hardware/motherboards, and tried the
"Persistence" control on all of them.
EVERY SINGLE ONE OF THEM failed, provoking an OpenGL exception from
glAccum, which, it turns out, is an optional feature, and at least in
this little survey, not a single piece of my hardware supported that op.
How many people actually use "persistence"? (As opposed, I must be
clear, to "Peak Hold"). I suspect that a workable approach is to,
for now, remove that feature entirely, but I don't have a good feel
for who uses it.
Near as I can tell, the "persistence" feature is intended to give a kind
of storage-scope effect, or high-persistence phosphor effect.
But the "effect" uses a non-mandatory OpenGL feature (the accumulator
buffer) which appears, at least on the garden-variety
video hardware I use, not to be supported. And to be clear, I'm
running modern motherboards on two of my systems, but using
the on-board video, since I'm not a gamer, and really, the simple 2D
effects Gnu Radio uses aren't particularly taxing.
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
_______________________________________________
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
