[Octave-bug-tracker] [bug #65622] contour3: Octave crashes when rotating plot with "showtext" on with System OpenGL driver

[Ilya]

Follow-up Comment #19, bug #65622 (group octave):

Hello, and thank you to the community for supporting such an important
software as GNU Octave.

I am a user of GNU Octave and a lecturer at the university, where I am trying
to teach students to use this free software in their engineering practice.
Therefore, for me as a user, it is most important to have stable performance
on any computer, and especially on laptops.

However, there are people who are professional programmers and can create new
versions of Octave, fix bugs in the code, and for them it is of most
importance to provide users with flexibility and fast rendering of graphics.

In my opinion, the better choice is to include a small message in the
installer options explaining the pros and cons of Software OpenGL and System
OpenGL (as well as the same for the BLAS library implementation), just give
more information than now. I believe this is not a difficult task, but the
improvement is significant: users will know, for example, that Intel HD
graphics may cause problems, and they will have the option to choose a slower
but more stable software renderer (and switch between renderers at any time if
desired) based on the information and explanation provided during the
installation process.

Because I myself (and it may be due to my own lack of knowledge) only became
aware of the difference between Software OpenGL and System OpenGL, and the
possibility to switch between them after installation, after experiencing
several crashes and only finding out about it on this forum.


[comment #11 комментарий №11:]
> It is possible that Octave is doing something wrong somewhere. But  the
issues seem to be limited to Intel graphics. (At least, that's what I gathered
from the reports we got during the last year or so.) So, it is also possible
that the issue is with the OpenGL implementation that is vendored by Intel.
> Software rendering can be multiple orders of magnitudes slower for some
complex scenes than hardware rendering. In my strong opinion, we shouldn't let
*all* users suffer from potential deficiencies in probably only *some*
vendored OpenGL implementations.
> Additionally, we got reports from some users for which the software OpenGL
libraries caused crashes. That is another strong reason for *not* defaulting
to software OpenGL imho.
> 
> All in all, we shouldn't change the default for the Windows installer to
software OpenGL in my opinion.
> 


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