[GtkGLExt] Re : Off-screen pixmap rendering doesn't work

Hi Damien,

Thanks for your suggestion. Setting 'Option "AIGLX" "off"' in the
ServerFlags section of
your /etc/X11/xorg.conf fixed the problem. Disabling DRI also fixes
the problem. Unfortunately both solutions make rendering SIGNIFICANTLY
slower. Note that I am also seeing this problem with my ATI
Technologies, Inc. RV280 [Radeon 9200 PRO] card using the "radeon"

If anyone knows of any other fix for the problem that doesn't have
slower rendering as a side effect, or has any more info on the nature
of this problem, please let me know.


2007/2/5, Damien Caliste <dcaliste free fr>:

   First, I apologise since I don't know how to answer the last mail of
the thread through the HTML archive page...

   The problem of offscreen rendering you encountered is not due to
gtkglext. I've got the same configuration than you (i810 + DRI + Xorg
7.1.1) and the offscreen rendering is not working from whatever OpenGL
code used (gtkglext or another). The error raised is GLXBadContext, as
you mentionned.

   I've found a turn around than is to turn off the AIGLX extension
from Xorg, as mentioned in a thread from Fedora

   To do it, add 'Option "AIGLX" "off"' in the ServerFlags section of
your /etc/X11/xorg.conf file). Then, the error may be related to DRI
(since it doesn't appear when DRI is turned off) and to AIGLX.


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