The PCI scanning code in XF86Bus.c that appears to cause this issue on 6.9.0 survives into Xorg 7.x, so probably Intel i915GM users will continue to experience it. I have not tested this issue with 7.x as modular Xorg is not yet released for FreeBSD. The original problem report is at https://bugs.freedesktop.org/show_bug.cgi?id=10055. I include it here tagged agains 7.2 as I suspect looking at 6.9 bugs is not a big priority at the moment. Apologies if this is not the right way to log this.
*** This bug has been marked as a duplicate of bug 10055 ***
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