I just want to help you whith 2 little tings :
- first there is a 2.5 agppatch at this adress :
- secondary there is a little hack to this patch made by me to come back to kernel 2.4 ( in attachment)
You will test it with this :
(cc testgart.c ; ./a.out)
Before testing with xfree if it's work you can go on with xfree, but it doesn't seems to work with Ati proprietary drivers under Xfree 4.3 (doesn't hang up the kernel but hang up the display) . I have radeon 9700 pro so I can't test with xfree drivers.