I can't help to thank every contributors on new xorg stack and official pkgng package infrastructure works.
After installing fresh FreeBSD 10-STABLE snapshot (r268572), I installed kms enabled new xorg as well as XFCE 4.10 from official WITH_NEW_XORG repository. Just 20 minutes later, my acer notebook with ATI chipset run compositing enabled XFCE 4.10 desktop flawlessly. I don't need to compile them from ports anymore.
After installing fresh FreeBSD 10-STABLE snapshot (r268572), I installed kms enabled new xorg as well as XFCE 4.10 from official WITH_NEW_XORG repository. Just 20 minutes later, my acer notebook with ATI chipset run compositing enabled XFCE 4.10 desktop flawlessly. I don't need to compile them from ports anymore.