Hi

I can't run Gtkradiant
(http://www.qeradiant.com/cgi-bin/trac.cgi) with the radeon
driver and the following hardware/software:

01:00.0 VGA compatible controller: ATI Technologies Inc RV350
[Mobility Radeon 9600 M10]

Libraries and driver from Debian testing (6.6.193-3 driver's
version)
Libraries and driver from Debian unstable (6.7.195-2
driver's version)

The program crashes as soon as I try to use it, and the
following is read in its console:


Lighting mode requires OpenGL features not supported by your
graphics drivers: GL_ARB_shader_objects
 GL_ARB_vertex_shader
 GL_ARB_fragment_shader
 GL_ARB_shading_language_100


After it crashes the following appears in the terminal:


radiant.x86: vbo/vbo_split_inplace.c:97: flush_vertex: Assertion
`max_index >= min_index' failed. Aborted


I've been told in the Gtkradiant mailing list that it's a driver
issue, specifically:

"[...]older Radeon cards have only the ability to address up to
4096 vertices at a time [...] GTKRadiant is
issuing more than this many vertices in one call.

The hardware however has configurable base address for vertex
arrays, and configurable index bias, this allows it to issue the
large draw operation as several smaller ones that do not violate
the limits of the hardware.

That error indicates the code for splitting the operations into
smaller ones, is broken.

(All other drivers have to deal with this sort of hardware
limitation transparently as well, it's not an application error)"

And been encouraged to report this here. I would like to ask for
confirmation that there's no workaround possible short of fixing
code (which I have no idea about).

Thanks

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