OpenGL issues

A collection of various OpenGL problems and workarounds

ATI initialization crash

The ati binary driver overwrites some cpu registers it should not touch by default. Although Wine attemts to catch this, the check seems to fail sometimes, resulting in a crash when initializing winex11.drv:

=>1 0xf7cf0d63 (0x0034e988)
   2 0x7e90e7c7 in winex11 (+0x3e7c7) (0x0034ea08)
   3 0x7e910b75 X11DRV_setup_opengl_visual+0x35() in winex11 (0x0034eaf8)
   4 0x7e921738 in winex11 (+0x51738) (0x0034ed08)
   ...

Or simmilar.

A workaround is to set UseFastTLS to "2" in fglrx's driver section in xorg.conf:

Option "UseFastTLS" "2"