Re: [Visualpython-users] vpython on ubuntu

[Tony R. <To...@br...>]

Yeah I opened that report but I haven't got any feedback yet.

I'm not sure what it means, but I took the python-visual 5.11 package from sid, tweaked the package slightly (python version was set to less than 2.6, I changed that to 2.7 so it would install, that's the only change I made) and tried it on ubuntu jaunty and karmic.

Segfaults under python 2.6, but oddly works fine when ran under python 2.5. 32 and 64 bit both fail under 2.6, not sure off the top of my head if I was using the nvidia binary graphics driver or not, I don't think I was.

As stated by another in that bug report:

"Please consider raising the importance from medium to high.  Not having this package working is a deal breaker in many educational environments."

But now that I've typed this whole message, I now see that person's name was "gs", and is probably you :-)

-----Original Message-----
From: Guenter Schneider [mailto:Gue...@ph...]
Sent: Tuesday, September 15, 2009 8:13 PM
To: vis...@li...
Subject: [Visualpython-users] vpython on ubuntu

I have struggled to get vpython fully working on ubuntu for a while now.
Here is my summary what I learned. Let me say right away, as far as I
can tell it's not a vpython problem.

First, unlike others on this list, I have no problems compiling vpython
5.12. It works using debian Lenny on any computer I have tried. By
'it works' I mean these simple tests do not result in seg. faults:

TEST 1:
 >>> from visual import *
 >>> v = vector('x')
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
ValueError: Vectors must be constructed from sequences of 2 or 3 float
members.
 >>>

TEST 2:
 >>> from visual import *
 >>> v=vector(1,2,3)
 >>> for i in v:
...     print i
...
1.0
2.0
3.0
 >>>

On ubuntu 9.04 it works on some computers but not on others. It doesn't
matter if I use 32 bit or 64 bit ubuntu 9.04.

In fact the same pattern holds true in my tests for the python-visual
package that is distributed with ubuntu 9.04 (which is vpython 3.2.9).
It fails on all computers if a proprietary graphics driver is not
installed. Activating an nvidia proprietary graphics driver results in a
working vpython (as defined above), on system with ati graphics cards I
was not so lucky. I tried 6 different computers, 2 with nvidia graphics
and 4 with ati graphics.

I got the same result for ubuntu 8.10. It always works with ubuntu 8.04.3.

I filed a bug report with ubuntu against vpython since I have no idea
what is causing this problem.

I could not try python-visual on karmic alpha (which 5.11) since that
leads to a seg fault like this

 >>> from visual import *
Segmentation fault

There is already a bug report for this.

Guenter




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