Problems with radeon_dri and Blender

meino.cramer at meino.cramer at
Wed Jul 2 10:25:01 PDT 2008

Alex Deucher <alexdeucher at> [08-07-02 18:56]:
> On Wed, Jul 2, 2008 at 12:17 PM,  <meino.cramer at> wrote:
> > Hi,
> >
> > When using Blender my radeon_dri driver crashes with a segfault (and
> > Blender follows :-/  ). But it only happens when some very specific actions
> > are performed and only if the Shading ("Z") is activated for the 3D view.
> >
> > Currently I am only able to watch this. And dont know how to pinpoint
> > the problem and whether the radeon_dri driver or Blender (or both) or
> > the hardware habe a problem.
> >
> > If someone is interested, I will post an *.blend file to trigger the
> > segfault.
> The best starting point would be if you could get a backtrace from
> blender using gdb.

Here ist comes:

solfire:/home/mccramer>gdb blender
GNU gdb 6.7.1
Copyright (C) 2007 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-linux-gnu"...
Using host libthread_db library "/lib/".
(gdb) run
Starting program: /usr/local/bin/blender
[Thread debugging using libthread_db enabled]
[New Thread 0xb74af910 (LWP 24683)]
Compiled with Python version 2.4.4.
Checking for installed Python... got it!

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb74af910 (LWP 24683)]
0xb733f3e3 in vbo_split_prims () from /usr/lib/dri/
(gdb) backtrace
#0  0xb733f3e3 in vbo_split_prims () from /usr/lib/dri/

it is not that much, but....

> Alex
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