With git tip (as of today - 11 Sept 2017) launching scilab I get
javax.media.opengl.GLException: X11GLXDrawableFactory - Could not initialize shared resources for :0
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
... 2 more
Almost sure, it used to work up to a few days ago.
Scilab works fine with LIBGL_ALWAYS_SOFTWARE=1
So ... what changed since a few days ago?
Find a version of mesa that works and bisect?
Contrary to what I have just said, scilab does not work anymore with LLVMPIPE either, aka LIBGL_ALWAYS_SOFTWARE=1.
Almost impossible for me to bisect, since this machine is shared by multiple users. Currently, the machine is on git version of drivers only thanks to the fact that there is a PPA for up to date drivers on ubuntu. Unfortunately, PPAs do not make easy to downgrade to previous versions of packages on the same PPA.
So it sounds like an issue not related to nouveau then?
May be related, may be two independent issues. The way in which the issue triggers is different:
- with nouveau, scilab complains at start up
- with llvmpipe, scilab does not complain at start up but throws java exception as soon as you try to make a plot.
The two have in common some infrastructure code, I guess, so the issue may lay there. Having both nouveau and the software rendering broken for this usage case at the same time is a bit unfortunate.
Is scilab an application that I can run myself? If not, you're probably on your own.
Yes, it is. It is free software. You can download it at www.scilab.org. Please, take version 5.5.2 (http://www.scilab.org/en/download/previous) since the latest version (6) is young and has some problems on its own.
Once you have downloaded it, just unpack it in some dir. Then,
1) try simply starting. There is a bin dir, with the scilab executable in in.
With nouveau on my hardware I already get issues at this point.
2) If it starts, you get an application window which may include multiple panels ( I do not remember if on a fresh install you have multiple panels or just one). One of the panels is the Scilab Console. In it write
plot([0 0], [1 1])
and see what happens.
Most likely, you will get an empty plot and a java exception.
*** This bug has been marked as a duplicate of bug 103078 ***
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