Hi Rico,
today, after upgrading from stable to testing, a few gnome programs
stopped working. Since one of them is evolution, I googled about the
problem and found an already opened bug (see #721312). After debugging a
little bit, I found that the error message "The OpenGL version could not
be determined" is emitted by the libcogl12 library.
The reason of the error message is in source file cogl/cogl-context.c,
in function _cogl_context_get_gl_version (CoglContext *context) because
function call context->glGetString (GL_VERSION) returns NULL.
I do not think the problem is just on that function call, since even
avoiding it by the use of COGL_OVERRIDE_GL_VERSION variable, all
programs eventually segfaults. As in:
giuseppe@blatta:/tmp/cogl-1.14.0$ sudo tail -f /var/log/syslog &
giuseppe@blatta:/tmp/cogl-1.14.0$ COGL_OVERRIDE_GL_VERSION=1.4 cheese
(cheese:11268): GLib-CRITICAL **: g_strsplit: assertion `string != NULL'
failed
Sep 8 17:31:15 blatta kernel: [ 2608.342244] cheese[11268]: segfault at
0 ip 00007fba4ff424cc sp 00007fff87ffceb0 error 4 in
libcogl.so.12.1.1[7fba4ff11000+97000]
Errore di segmentazione
or
giuseppe@blatta:/tmp/cogl-1.14.0$ COGL_OVERRIDE_GL_VERSION=1.4 evolution
(evolution:11274): GLib-CRITICAL **: g_strsplit: assertion `string !=
NULL' failed
Sep 8 17:31:58 blatta kernel: [ 2651.672205] evolution[11274]: segfault
at 0 ip 00007f0db84b64cc sp 00007fff308feda0 error 4 in
libcogl.so.12.1.1[7f0db8485000+97000]
Errore di segmentazione
These are my GLX information:
giuseppe@blatta:/tmp/cogl-1.14.0$ fglrxinfo
display: :0 screen: 0
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7700M Series
OpenGL version string: 4.3.12438 Compatibility Profile Context FireGL
8.982.13
giuseppe@blatta:/tmp/cogl-1.14.0$ glxinfo | head -14
name of display: :0
display: :0 screen: 0
direct rendering: Yes
server glx vendor string: ATI
server glx version string: 1.4
server glx extensions:
GLX_ARB_multisample, GLX_EXT_import_context,
GLX_EXT_texture_from_pixmap,
GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_OML_swap_method,
GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGIS_multisample,
GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group
client glx vendor string: ATI
client glx version string: 1.4
client glx extensions:
GLX_ARB_create_context, GLX_ARB_create_context_profile,
I am unable to keep investigaing on this subject right now, but if you
need any test by my side on this machine, just let me know.
Thanks,
Giuseppe