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[IDV #RRP-441625]: Strange IDV/Xvfb behavior

Hi Samuel-

> No problem checking this, glad to be of help.
> 
> I don't understand why any drivers would come into play at all, since Xvfb is 
> supposed to be used for 'headless' displays, or computers that cannot display 
> a window.  I am only using Xvfb for batch purposes.  I don't want IDV to 
> display on any VDT on the local machine (shu.cup.edu)

In the end, Java 3D makes OpenGL calls. Xvfb uses a specific version
of the GL library.  The older version of Java 3D that you were using
with the first install, should be compatible with the GL that Xvfb uses.
The newer one that you just tried needs OpenGL 1.3 and last I knew,
Xvfb only supported OpenGL 1.2.  However, I would suspect a warning
or error, not a crash.

> I don't mind giving them the bundle/isl script to run, but will they know how 
> to run them?
> 
> Well, I'll give them the script/bundle, and see what happens.

Thanks.  My system upgrade did not go well, and I'm only now at
a point where I can test things.  I'll try to work on this tomorrow.

Don Murray

> -----Original Message-----
> From: Unidata IDV Support [mailto:address@hidden]
> Sent: Monday, July 14, 2008 5:35 PM
> To: Zehel, Samuel
> Cc: address@hidden
> Subject: [IDV #RRP-441625]: Strange IDV/Xvfb behavior
> 
> Hi Samuel-
> 
> Thanks for checking this.
> 
> > I get the following when I run IDV with 3D support:
> > [weatherctr@shu 1km]$ /home/kauffman/IDV/runIDV 
> > /home/kauffman/bundles/GOES_East/1km/kpit.isl
> > Mon Jul 14 16:41:13 EDT 2008: Loading bundle: 
> > /home/kauffman/bundles/GOES_East/1km/bundles/kpit.xidv
> > Java 3D WARNING : reported GLX version = 1.2
> > GLX version 1.3 or higher is required
> > The reported version number may be incorrect.  There is a known
> > ATI driver bug in glXQueryVersion that incorrectly reports the GLX
> > version as 1.2 when it really is 1.3, so Java 3D will attempt to
> > run anyway.
> > JAVA 3D: OpenGL 1.2 detected; will run with reduced functionality
> > JAVA 3D: OpenGL 1.2 detected; will run with reduced functionality
> > JAVA 3D: OpenGL 1.2 detected; will run with reduced functionality
> 
> This I expected.  ATI drivers are problematic.
> 
> > I have a simultaneous terminal window open running Xvfb, and this is what I 
> > get when I run Xvfb:
> > [weatherctr@shu 1km]$ /usr/bin/Xvfb :3 -screen 3 1280x1024x24 -fbdir 
> > /var/tmp
> > Segmentation fault (core dumped)
> >
> > I have enclosed an image of what 'xwud -in /var/tmp/Xvfb_screen3' produces.
> 
> This I didn't expect since it appears to be the same as what happens
> with the older version of Java 3D.  We'll see what Red Hat support says.
> I said that you could provide them with the bundle and isl script to test.
> 
> Don Murray
> _____________________________________
> > From: Zehel, Samuel
> > Sent: Monday, July 14, 2008 4:32 PM
> > To: address@hidden
> > Subject: RE: [IDV #RRP-441625]: Strange IDV/Xvfb behavior
> >
> > Sure, will do.
> >
> >
> > -----Original Message-----
> > From: Unidata IDV Support [mailto:address@hidden]
> > Sent: Monday, July 14, 2008 4:31 PM
> > To: Zehel, Samuel
> > Cc: address@hidden
> > Subject: [IDV #RRP-441625]: Strange IDV/Xvfb behavior
> >
> > Hi Samuel-
> >
> > > Just as another comment, I have a technical support call into Red Hat as 
> > > well, since I'm thinking this is an Xvfb problem, but I thought I'd send 
> > > a shout your way as well.
> >
> > Okay.  I just gave them access to the version you are using.
> >
> > Can you try installing the other Linux version which has an updated
> > Java 3D version and see if that works?
> >
> > Don
> >
> > > -----Original Message-----
> > > From: Zehel, Samuel
> > > Sent: Friday, July 11, 2008 4:01 PM
> > > To: Zehel, Samuel; 'address@hidden'
> > > Subject: RE: [IDV #RRP-441625]: Strange IDV/Xvfb behavior
> > >
> > > Just as a comment:
> > > I don't think it's the video-card configuration, since I can run this 
> > > .ISL script with no problem from the console of the HP ML370 machine.   
> > > The HP ML370 machine is the one that can't run the IDV .ISL script in 
> > > Xvfb (which should be hardware independent anyway)
> > >
> > > -----Original Message-----
> > > From: Zehel, Samuel
> > > Sent: Friday, July 11, 2008 3:59 PM
> > > To: 'address@hidden'
> > > Subject: RE: [IDV #RRP-441625]: Strange IDV/Xvfb behavior
> > >
> > > Both machines don't have the same card (I don't think so anyway), the 
> > > RHEL5 machine is running on an HP ML370 with a stock video 
> > > card(Integrated ATI ES1000, 32 MB video standard), and the RHEL3 machine 
> > > is running on a DELL platform, with a stock video card(Integrated 
> > > ATI-Rage XL controller with 8MB of SDRAM (not upgradable).  I thought the 
> > > whole point of Java was to make graphics rendering platform (video card) 
> > > independent.
> > > They are running the same version of IDV (2.5)
> > > They are running the same version of Java (1.5.0_11)
> > > They are running the same version of Java3D (1.3.1)
> > >
> > > -----Original Message-----
> > > From: Unidata IDV Support [mailto:address@hidden]
> > > Sent: Friday, July 11, 2008 3:45 PM
> > > To: Zehel, Samuel
> > > Cc: address@hidden
> > > Subject: [IDV #RRP-441625]: Strange IDV/Xvfb behavior
> > >
> > > Hi Samuel-
> > >
> > > > I've recently installed a RHEL5 system, and copied all of our .ISL 
> > > > scripts from a RHEL3 machine, to run them on our RHEL5 machine.
> > > >
> > > > For some strange reason, the .ISL scripts terminate IDV if I run them 
> > > > in an Xvfb session, and the Xvfb session dies in Segmentation fault.
> > > >
> > > > The exact same script works fine in Xvfb on our RHEL3 machine, and the 
> > > > script even works fine if run from the console of our RHEL5 machine, 
> > > > but for some strange reason the script doesn't run correctly on our new 
> > > > machine thru Xvfb.
> > > >
> > > > I'm at a loss as to why Xvfb goes into Segment fault.  I've tried every 
> > > > combination of resolution/depth I could think of, but they all seem to 
> > > > segment fault the Xvfb server.
> > > >
> > > > I tried the most suggested resolution&depth (1280x1024x24), and ran the 
> > > > .ISL script from another terminal.  Using xwud, I can see that IDV 
> > > > starts, and creates the image properly, but it seems to crash when it 
> > > > tries to write the output to a .PNG file.
> > > >
> > > > IDV reports no error, only Xvfb dies on a Segmentation fault.
> > > >
> > > > I can run other Xwindows applications (albeit simple) like xeyes, with 
> > > > no problem on Xvfb.
> > > >
> > > > Samuel M. Zehel Jnr
> > >
> > > I suspect there is some issue between Java 3D and Xvfb.
> > >
> > > Do both systems have the same graphics card?  If so, what is that?
> > >
> > > Are they both running the same version of IDV?  In particular,
> > > are they both running the same version of Java 3D?  You
> > > can check through the Help->About... menu and clicking on
> > > the System tab in the dialog.  It will show what version of
> > > Java and Java 3D you are running.
> > >
> > > We don't have Xvfb set up here, so we'll have to get that
> > > set up and run some tests.  In the meantime, please let
> > > me know the answers to the questions above.
> > >
> > > Don Murray
> > >
> > >
> > >
> > > Ticket Details
> > > ===================
> > > Ticket ID: RRP-441625
> > > Department: Support IDV
> > > Priority: Normal
> > > Status: Open
> > >
> > >
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: RRP-441625
> > Department: Support IDV
> > Priority: Normal
> > Status: Open
> >
> >
> >
> 
> 
> Ticket Details
> ===================
> Ticket ID: RRP-441625
> Department: Support IDV
> Priority: Normal
> Status: Open
> 
> 


Ticket Details
===================
Ticket ID: RRP-441625
Department: Support IDV
Priority: Normal
Status: Open