Hi Chris,
The more your describe of the problem the more it sounds like a driver
problem of some sort and the OSG is just un-lucky in that it
triggering it.
A few things you could try are:
1) Force the threading model to SingleThreaded i.e.
osgviewer cow.osg --SingleThreaded
OR
set OSG_THREADING=SingleThreaded
osgviewer cow.osg
2) Look for OpenGL errors output to the console.
3) Try the SVN version/2.18 as there have been threading bug fixes,
although Serge is reporting problems here but this might be
unrelated.
FYI, I'm currently under Kubunto, Intel quad core + 8800GTS + 7800GT.
Robert.
On 8/29/07, Chris Davoren <[EMAIL PROTECTED]> wrote:
> Robert,
>
> The two cards are in two separate machines, on which I am getting a
> similar error. However, the worse by far is the machine with the 8800
> GTX, so that is the one on which I have focussed my testing efforts.
>
> It seems that the driver does not freeze permanently; sometimes I can
> regain control by holding down escape (in osgviewer) which eventually
> quits the program returns apparently normal control. This definitely
> leaves the OpenGL driver in a corrupted state though, because from the
> first time osg breaks, all other OpenGL programs show similar geometry
> glitches and freezes. This persists until reset.
>
> I want to stress however that this never happens if I do not run an
> osg-based application.
>
> I agree that it definitely *looks* like a driver issue, but the facts
> that I am using unexceptional hardware, the latest nvidia driver
> (162.18) that I presume most windows developers here are also using,
> and that no other OpenGL or Direct3D applications show any problems
> makes me scratch my head a bit. Is there anyone else here/do you know
> of anyone using osg under WinXP with an 8-series nvidia card?
>
> I should add that the system dual boots with Ubuntu, under which I get
> no such error. This steers me away from the conclusion that this is a
> hardware fault. All in all I'm pretty stumped.
>
> Chris.
>
> On 7/31/07, Robert Osfield <[EMAIL PROTECTED]> wrote:
> > Hi Chris,
> >
> > This really sounds like a OpenGL driver issue. W.r.t other OpenGL
> > apps, are they opening up on both cards at one time like the OSG
> > examples will try to do later, it could be the driver is struggling
> > with handle two graphics cards at once.
> >
> > Things you could try is forcing the apps to open up on a particular
> > screen by setting the OSG_SCREEN env var to 0 or 1.
> >
> > Robert.
> >
> >
> >
> > On 7/31/07, Chris Davoren <[EMAIL PROTECTED]> wrote:
> > > Thanks for replying Robert.
> > >
> > > I am using the latest version of OSG: 2.0, released on the 15th of June.
> > >
> > > The two cards in question are a 6600GT and an 8800GTX, both of which are
> > > using the latest stable (not beta) drivers from Nvidia. My first thought
> > > was a driver issue too, except that I can't get any other OpenGL programs
> > > to
> > > fail. Is there a way I can identify this kind of issue?
> > >
> > > As far as I can tell, pretty much all of the examples can or will fail at
> > > some point. Specifically, the osgsimulator example runs very poorly on
> > > the
> > > 6600GT (low framerate, globe reflection flickers and is backed by a black
> > > rectangle) and bringing text up on the screen, such as by pressing H in
> > > osgsimulator, seems to encourage the error to happen more often.
> > >
> > > Thoughts?
> > >
> > > Chris Davoren.
> > >
> > > _______________________________________________
> > > osg-users mailing list
> > > [email protected]
> > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> > >
> > >
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> >
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