http://bugs.winehq.org/show_bug.cgi?id=2426
------- Additional Comments From frix@engineer.com 2004-17-08 11:32 ------- The problem seems to be GLX related. After upgrading from xfree86 version 4.3 to X.org 6.7 the DRI (Direct Render Interface) didn't allow my user applications (wine, etc) to gain direct access to the excelleration hardware, but only to applications initiated by user 'root'. This was evident by launching 'glxgears' and witnessing the error message: libGL error: open DRM failed (Operation not permitted)
The problem, for wine and glxgears, went away after adding these entries to my /etc/X11/xorg.conf and restarting X: Section "DRI" Mode 0666 EndSection
More can be read about DRI options at: http://dri.sourceforge.net/doc/DRIuserguide.html