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Qt-interest Archive, March 2002
X-server crash with QGLWidget::renderPixmap

• Subject: X-server crash with QGLWidget::renderPixmap
• From: Buddy Coffey <bcoffey@xxxxxxxxxx>
• Date: Mon, 25 Mar 2002 15:32:16 -0700
• Organization: Advanced Electromagnetics
• Reply-to: bcoffey@xxxxxxxxxx
• To: qt-interest@xxxxxxxxxxxxx

When using renderPixmap() on a QGLWidget, I get a segfault (Qt 2.3.x) or 
X-server crash (Qt 3.0.x) with an nVidia QuadroPro2 graphics card (using 
latest nVidia driver - 1.0-2802).

One easily reproducible example is in executing the glpixmap Qt example 
problem.

I suspect there's an incompatibility between the driver and Qt... or perhaps 
I need a different setting in my configuration file.  This problem goes away 
on non-nVidia systems.

Here are some system stats that may be of help:

Qt:  3.0.3
Xfree 4.1.0
nvidia GLX/kernel drivers: 1.0-2802, March 7, 2002

All other openGL functions seem to work fine; only renderPixmap() is giving 
me a problem.

Thanks in advance,
Buddy Coffey
Advanced Electromagnetics