visualpython-users

[Visualpython-users] seg faulting

[Andrew M. <agm...@gm...>]

I've been a long time user of vpython for visualizing results of my
simulations. However, this just started happening today:

<vis...@li...>andy@andyLab:~/fer$ python
Python 2.7.3 (default, Aug  1 2012, 05:14:39)
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from visual import box
>>> box()
Segmentation fault (core dumped)
andy@andyLab:~/fer$

I suspect the issue has to do with the fact that I installed new NVIDIA
graphics drivers about a week ago to install CUDA. I'm running Ubuntu 12.04
64 bit. Any ideas?

-- 
Sincerely,

Andrew McCormick

Re: [Visualpython-users] seg faulting

[John Z. <joh...@wa...>]

Hi,

I am talso rying to run Vpython on a 64-bit Ubuntu 12.04 and having this problem. I don't think it's the new NVIDIA driver per se causing the issue. What I have discovered is that python-visual works fine on a clean install (including updates). However, as I install other packages, the visual module eventually breaks. This happens during a lab install that includes lots of additional packages that I install en masse. I started installing packages one-by-one and testing after each install. I got about 1/2 way through and had installed everything that I thought could possibly be related; vpython still worked. Then I got impatient and installed all the rest. Naturally, it broke again. It seems to me some package is installing a tweaked version of a library (perhaps something in libboost???) that kills vpython.

I will have a lab assistant again starting next week, and I am going to have him go through package by package to see if we can find what's breaking the python-visual module.

--John

John Zelle, PhD
Professor of Computer Science
Wartburg College

________________________________
From: Andrew McCormick [agm...@gm...]
Sent: Friday, August 31, 2012 6:19 AM
To: vis...@li...
Subject: [Visualpython-users] seg faulting

I've been a long time user of vpython for visualizing results of my simulations. However, this just started happening today:

<mailto:vis...@li...>andy@andyLab:~/fer$ python
Python 2.7.3 (default, Aug  1 2012, 05:14:39)
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from visual import box
>>> box()
Segmentation fault (core dumped)
andy@andyLab:~/fer$

I suspect the issue has to do with the fact that I installed new NVIDIA graphics drivers about a week ago to install CUDA. I'm running Ubuntu 12.04 64 bit. Any ideas?

--
Sincerely,

Andrew McCormick

Re: [Visualpython-users] seg faulting

[Bruce S. <Bru...@nc...>]

I find that several different VPythons on my seldom-used 64-bit Ubuntu
machine have stopped working (for Python 2.7, 3.1, 3.2). There is a
hint that maybe an automated update to libboost killed them.

Bruce Sherwood

On Fri, Aug 31, 2012 at 1:02 PM, John Zelle <joh...@wa...> wrote:
> Hi,
>
> I am talso rying to run Vpython on a 64-bit Ubuntu 12.04 and having this
> problem. I don't think it's the new NVIDIA driver per se causing the issue.
> What I have discovered is that python-visual works fine on a clean install
> (including updates). However, as I install other packages, the visual module
> eventually breaks. This happens during a lab install that includes lots of
> additional packages that I install en masse. I started installing packages
> one-by-one and testing after each install. I got about 1/2 way through and
> had installed everything that I thought could possibly be related; vpython
> still worked. Then I got impatient and installed all the rest. Naturally, it
> broke again. It seems to me some package is installing a tweaked version of
> a library (perhaps something in libboost???) that kills vpython.
>
> I will have a lab assistant again starting next week, and I am going to have
> him go through package by package to see if we can find what's breaking the
> python-visual module.
>
> --John
>
> John Zelle, PhD
> Professor of Computer Science
> Wartburg College

Re: [Visualpython-users] seg faulting

[Bruce S. <Bru...@nc...>]

Fixed. When I tried to run, I was told that a libboost library was
missing. I made sure that there was a complete set of development
libraries for libboost python, signals, and thread, rebuilt. When I
ran this rebuilt VPython, I was told that there was a mismatch between
components of the NVIDIA driver environment. I looked up that error
message on the web and followed instructions to purge NVIDIA files and
reinstall, then reboot. Now VPython works.

All of this presumably is due to the updates that Ubuntu continually
wants to do, which have the effect of causing various kinds of
failures. It seems like you still have to be very expert with
computers to be able to use Ubuntu, and you need to know how to search
the internet to find out what arcane procedure is needed to be able to
continue using the system. Ugh.

Bruce Sherwood

On Fri, Aug 31, 2012 at 1:58 PM, Bruce Sherwood <Bru...@nc...> wrote:
> I find that several different VPythons on my seldom-used 64-bit Ubuntu
> machine have stopped working (for Python 2.7, 3.1, 3.2). There is a
> hint that maybe an automated update to libboost killed them.
>
> Bruce Sherwood

Re: [Visualpython-users] seg faulting

[Guy K. K. <guy...@au...>]

On 01/09/12 15:35, Bruce Sherwood wrote:
> Fixed. When I tried to run, I was told that a libboost library was
> missing. I made sure that there was a complete set of development
> libraries for libboost python, signals, and thread, rebuilt. When I
> ran this rebuilt VPython, I was told that there was a mismatch between
> components of the NVIDIA driver environment. I looked up that error
> message on the web and followed instructions to purge NVIDIA files and
> reinstall, then reboot. Now VPython works.

OK, did anybody actually make the effort and report those bugs/fixes
upstream to the Ubuntu team [1] or even better the Debian team [2]?
Without that, I doubt that there'll ever be a "stable" situation where
these things can be taken care of by the distributors, which won't help
a wide spread use or the reputation of VPython.

Particularly a report on how to fix it would likely make it quickly into
the releases.

Guy

[1] https://bugs.launchpad.net/
[2] http://bugs.debian.org/cgi-bin/pkgreport.cgi?package=python-visual

-- 
Guy K. Kloss
School of Computing + Mathematical Sciences
Auckland University of Technology
Private Bag 92006, Auckland 1142
phone: +64 9 921 9999 ext. 5032
eMail: Guy...@au...

Re: [Visualpython-users] seg faulting

[Bruce S. <Bru...@nc...>]

I have little experience with Linux, so I don't feel competent to make
a report. Nor do I know for sure that it was an automatic update of
the Boost libraries that was at fault. It would be interesting to know
whether someone else who has had problems was able to fix things in
the same way that worked for me.

Bruce Sherwood

On Sun, Sep 2, 2012 at 4:21 PM, Guy K. Kloss <guy...@au...> wrote:
> On 01/09/12 15:35, Bruce Sherwood wrote:
>> Fixed. When I tried to run, I was told that a libboost library was
>> missing. I made sure that there was a complete set of development
>> libraries for libboost python, signals, and thread, rebuilt. When I
>> ran this rebuilt VPython, I was told that there was a mismatch between
>> components of the NVIDIA driver environment. I looked up that error
>> message on the web and followed instructions to purge NVIDIA files and
>> reinstall, then reboot. Now VPython works.
>
> OK, did anybody actually make the effort and report those bugs/fixes
> upstream to the Ubuntu team [1] or even better the Debian team [2]?
> Without that, I doubt that there'll ever be a "stable" situation where
> these things can be taken care of by the distributors, which won't help
> a wide spread use or the reputation of VPython.
>
> Particularly a report on how to fix it would likely make it quickly into
> the releases.
>
> Guy
>
> [1] https://bugs.launchpad.net/
> [2] http://bugs.debian.org/cgi-bin/pkgreport.cgi?package=python-visual
>
> --
> Guy K. Kloss
> School of Computing + Mathematical Sciences
> Auckland University of Technology
> Private Bag 92006, Auckland 1142
> phone: +64 9 921 9999 ext. 5032
> eMail: Guy...@au...
>
>
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Re: [Visualpython-users] seg faulting

[Guy K. K. <guy...@au...>]

On 03/09/12 12:07, Bruce Sherwood wrote:
> I have little experience with Linux, so I don't feel competent to make
> a report. Nor do I know for sure that it was an automatic update of
> the Boost libraries that was at fault. It would be interesting to know
> whether someone else who has had problems was able to fix things in
> the same way that worked for me.

Well, that is information that might help the maintainer already, and it
may prompt others to contribute more (or try themselves to narrow down
the problem).

It's just that if nobody speaks up, problems like these will remain.

Guy

-- 
Guy K. Kloss
School of Computing + Mathematical Sciences
Auckland University of Technology
Private Bag 92006, Auckland 1142
phone: +64 9 921 9999 ext. 5032
eMail: Guy...@au...