Created attachment 63398 [details]
Xorg.0.log

First the problem, environment, hardware below:

I have a crash with KDE's kwin reported here
https://bugs.kde.org/show_bug.cgi?id=302169
and I was told it's a driver issue, therefore reporting it here.

In fact: I was away from the running Laptop, came back after about 30 minutes and saw that kwin had crashed.
I'll attach the complete backtrace. Probably the interesting part is:

Application: KWin (kwin), signal: Segmentation fault
[KCrash Handler]
#6  brw_update_renderbuffer_surface (brw=0x83f14f8, rb=0x826eac0, unit=0) at brw_wm_surface_state.c:959
#7  0xacb89343 in brw_update_renderbuffer_surfaces (brw=0x83f14f8) at brw_wm_surface_state.c:1052
#8  0xacb7347f in brw_upload_state (brw=0x83f14f8) at brw_state_upload.c:503
#9  0xacb5e807 in brw_try_draw_prims (max_index=77, min_index=0, ib=0x0, nr_prims=1, prim=0xbf944f28, arrays=0x8436d58, ctx=0x83f14f8) at brw_draw.c:482
#10 brw_draw_prims (ctx=0x83f14f8, arrays=0x8436d58, prim=0xbf944f28, nr_prims=1, ib=0x0, index_bounds_valid=1 '\001', min_index=0, max_index=77, tfb_vertcount=0x0) at brw_draw.c:566
#11 0xac89e7fe in vbo_draw_arrays (ctx=0x83f14f8, mode=4, start=0, count=78, numInstances=1) at vbo/vbo_exec_array.c:600
#12 0xb648b43d in KWin::GLVertexBufferPrivate::corePainting (this=0x821b5a8, region=..., primitiveMode=4, hardwareClipping=false) at /usr/src/debug/kde-workspace-4.8.90_20120617/kwin/libkwineffects/kwinglutils.cpp:1216

Now when I try to start kwin again and want to activate desktop effects, the crash happens immediately again.

environment, hardware:

I'm on a 32bit openSuse 12.1 on an Esprimo Mobile Laptop
with latest Xorg (7.6) packages installed
(rpms see here https://bugs.kde.org/show_bug.cgi?id=302169#c6 )

kwin output when I start it:
OpenGL vendor string:                   Tungsten Graphics, Inc
OpenGL renderer string:                 Mesa DRI Mobile Intel® GM45 Express Chipset x86/MMX/SSE2
OpenGL version string:                  2.1 Mesa 8.0.3
OpenGL shading language version string: 1.20
Driver:                                 Intel
GPU class:                              i965
OpenGL version:                         2.1
GLSL version:                           1.20
Mesa version:                           8.0.3
X server version:                       1.12.2
Linux kernel version:                   3.1.10
Direct rendering:                       yes
Requires strict binding:                yes
GLSL shaders:                           yes
Texture NPOT support:                   yes

From Xorg log:
X.Org X Server 1.12.2
[    34.385] (II) intel(0): Integrated Graphics Chipset: Intel(R) GM45
[    34.385] (--) intel(0): Chipset: "GM45"