paul1492 wrote:
> Can somebody do a test for me? I'm using OSG 3.0.0 and this works with NVIDIA
> Driver (Linux) 260.19.21 but doesn't seem to work with newer versions of the
> driver (e.g. 275.31 beta) with no other changes being made. I've been in
> contact with NVIDIA with this problem and they seem to think that it is an
> OSG problem.
>
> I'm having trouble when I create an osgViewer, destroy it, restart the X
> server and then create the osgViewer. I've boiled my problem down to a small
> test case in the attached file which is a slightly modified version of
> osgviewer.
>
> I know this test case is somewhat convoluted but bare with me. Our
> application is required to restart the X server before starting to display an
> image.
>
> Normally, osgviewer would do the following:
> 1) osgViewer::Viewer viewer(arguments);
> 2) viewer.setSceneData( loadedModel.get() );
> 3) viewer.realize();
> 4) viewer.run();
> 5) exit(0);
>
> I have modified it to do the following:
>
> Code:
>
> while (forever)
> {
> { // Define a scope of the osgViewer::Viewer
> osgViewer::Viewer viewer(arguments);
> viewer.setSceneData( loadedModel.get() );
> viewer.realize();
> viewer.run();
> } // osgViewer::Viewer scope has ended and its destructor called.
> sleep(2);
> system(“/usr/sbin/gdm-restart”);
> sleep(20);
> }
>
>
>
> Compile and run this program. Since this program restarts the X server (with
> the gdm-restart command) and attempts to display an image, you will need use
> two machines (a remote machine and a target machine). Running this using one
> machine will cause the program to be killed when the X server is restarted.
> To run this program, do the following:
>
> > a. On the console of the target machine, login normally. Open a terminal
> > window and type “xhost +”
> > b. From a remote computer login to your target machine and “setenv DISPLAY
> > :0.0” to keep the display on the remote machine.
> > c. From this remote computer window, run the attached version of osgviewer
> > as “osgviewer cow.osg”.
> > d. Hit the escape key on the target machine to dismiss the cow being
> > displayed.
> > e. At this point, the target machine X server will restart. IMMEDIATELY
> > after the X server has restarted, login to the target machine again from
> > its console. Open a terminal window and select “xhost +” again. It you
> > don't do this last part, you will not have permissions to display an image
> > on the target machine from the remote machine. The program will give you 20
> > second before it attempts to display an image on on the target machine.
> > f. At this point, you should see a cow image on the display but with this
> > new driver, we’ve been seeing a totally black image.
>
> When I run this program, instead of seeing the cow image the second time, I'm
> seeing a black screen. I didn't see this problem with earlier version of the
> NVIDIA driver (also using OSG 3.0.0).
>
> Is anybody else having this problem?
>
> Paul P.
Greetings!
Since your so lucky to try out one of NVidea Beta Drivers, have you ran this
across the NVidia test team first? Also, I didn't get what Graphics Card you
are using!
That is where I would go with this! OSG works on top of OpenGL other than that
it is doing nothing directly with the card.
If your using beta, I would look towards the fact that it may be still buggy!
Also, it has been my experience with NVidia that newer drivers in Linux, don't
necessary mean that it's an improvement. I have had to backtrack on drivers
even on my OpenGL code stuff because Nividia broke something in the process.
They are more concerned over a Windows driver than Linux I think!
------------------------
David Glenn
---------------
D Glenn 3D Computer Graphics & Media Systems.
www.dglenn.com
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=43874#43874
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