Comment 62 for bug 34043

Gaspard:
For a technical explanation see https://bugs.launchpad.net/ubuntu/+source/acpi-support/+bug/34043/comments/24 . The quick explanation is that it makes your system "even more binary only" as you switch to using NVIDIA's agpgart (or no agpgart at all). Ideally one should also make sure that the default agpgart driver (which varies by chipset) is blacklisted if you decide to switch by blacklisting otherwise the NVIDIA driver will not use agpgart at all (which results in performance loss) but that's really a support question and if you haven't noticed a difference I wouldn't waste time "fixing" it.