[Scilab-users] Ubuntu upgrade just killed GL

[Tim Wescott]

I've got my problems sorted -- the saga is in the link below.  In the
end, it seems to only relate to Scilab because Scilab uses OpenGL.

I suspect it's some peculiar corner case involving my combination of
software and hardware.

https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-331/+bug/1639371

On Thu, 2016-11-10 at 12:13 +0100, Clément David wrote:
> Hello Tim,
> 
> Thanks for the report, FYI I checked a Scilab 6 local build and a Scilab 5.5.2 on Ubuntu 16.04 and
> it seems to works (at least plot3d works).
> 
> I suggest you to reboot and trying to report your issue to Ubuntu on glxgear (which is the right 3D
> testing tool).
> 
> --
> Clément
> 
> Le vendredi 04 novembre 2016 à 12:17 -0700, Tim Wescott a écrit :
> > I'm 99.44% sure that the problem here resides in whatever video stuff
> > just got updated on Ubuntu 14.04 -- but the problem only seems to
> > exhibit itself under Scilab.
> > 
> > So, I'm hoping that someone of a more developer-ish bent could give me a
> > more mainstream Ubuntu test that'll let me submit a bug report to those
> > guys that'll attract attention.  Even better yet, if someone has some
> > suggested workarounds that would be exceptionally lovely.  I'm trying to
> > get some work delivered to a customer TODAY and things have just come to
> > a screeching halt -- hopefully I have a laptop around here that'll work.
> > 
> > I can't tell you details about the graphics card & whatnot, but I'm
> > willing to dig for it if you tell me it's important.
> > 
> > Attached are two files: devices.txt is the output of the "ubuntu-drivers
> > devices" command, while "scilab.doesnt.graph.txt" is the output of
> > Scilab's error stream when I start up, try to graph something, then
> > exit.  The program gets as far as opening a window on which to graph,
> > but fails utterly to actually put up a graph.
> > 
> > I tried installing and running glxgears, but it just says it can't get
> > an RGB channel without saying why -- I don't know if this is part of the
> > problem or not.
> > 
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> > users at lists.scilab.org
> > http://lists.scilab.org/mailman/listinfo/users
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-- 

Tim Wescott
www.wescottdesign.com
Control & Communications systems, circuit & software design.
Phone: 503.631.7815
Cell:  503.349.8432